Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Additional Information (Detail)

v2.4.0.8
Acquisitions - Additional Information (Detail) (USD $)
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended 1 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2012
Acquisition-related Costs
Jun. 30, 2013
Acquisition-related Costs
Jun. 30, 2012
Acquisition-related Costs
Jun. 30, 2012
Acquisition-related Costs
Acquired Intangible Assets
Jun. 30, 2013
Acquisition-related Costs
Acquired Intangible Assets
Jun. 30, 2012
Acquisition-related Costs
Acquired Intangible Assets
Mar. 31, 2013
RentSentinel
Mar. 31, 2013
RentSentinel
Developed product technologies
Mar. 31, 2013
RentSentinel
Customer Relationships
Mar. 31, 2013
RentSentinel
Common Stock Issuable in 12 Months and 24 Months
Tranche
Feb. 28, 2013
Seniors for Living, Inc.
Feb. 28, 2013
Seniors for Living, Inc.
Developed product technologies
Feb. 28, 2013
Seniors for Living, Inc.
Customer Relationships
Feb. 28, 2013
Seniors for Living, Inc.
Maximum
Jan. 31, 2012
Vigilan
Installment
Jan. 31, 2012
Vigilan
Developed product technologies
Jan. 31, 2012
Vigilan
Customer Relationships
Jan. 31, 2012
Vigilan
Maximum
Jul. 31, 2012
RMO
Jun. 30, 2013
RMO
Jun. 30, 2013
RMO
Jul. 31, 2012
RMO
Developed product technologies
Jul. 31, 2012
RMO
Customer Relationships
Jul. 31, 2012
RMO
Maximum
Jul. 31, 2011
SLN
Jun. 30, 2013
SLN
Jun. 30, 2013
SLN
Maximum
Jun. 30, 2012
SLN
Maximum
Jun. 30, 2013
MTS
Aug. 31, 2011
MTS
Jun. 30, 2013
MTS
Maximum
Jun. 30, 2012
MTS
Maximum
Jun. 30, 2012
MTS
Maximum
Business Acquisition [Line Items]                                                                          
Direct acquisition costs                     $ 100,000       $ 100,000       $ 100,000       $ 100,000                            
Cost of acquired substantially all of the assets                     10,500,000       2,700,000       5,000,000                                    
Maximum additional cash payable on acquisition                     7,600,000       2,300,000       4,000,000       5,500,000           500,000                
Deferred per installment amount                                   200,000       500,000           3,500,000                  
Business acquisition, deferred payment to be made after acquisition date period in months first                     12 months       6 months       12 months                                    
Business acquisition, deferred payment to be made after acquisition date period in months second                     24 months       12 months       24 months                                    
Amortized useful life of acquired intangible assets                       3 years 9 years     3 years 5 years     3 years 10 years         3 years 10 years                    
Business acquisition, equity interests issued or issuable, shares issued                     72,500     36,250                                              
Number of traunches                           2                                              
Number of deferred installments                                     2                                    
Amount withheld from purchase consideration subject to downward adjustment                                     1,000,000       3,500,000                            
Estimated fair value of common shares and conversion option                                             300,000 400,000 400,000                        
Acquisition-related contingent consideration of common stock                                             300,000                            
Estimated fair value of the acquisition-related contingent consideration                                             200,000           300,000                
Liability for future cash payment                                               1,300,000 1,300,000         200,000              
Gain (Loss) recognized due to change in fair value of cash consideration     1,445,000 182,000                                       400,000 (1,300,000)         (100,000) (100,000) 0 100,000   100,000 300,000 (100,000)
Gain (Loss) recognized due to change in fair value of conversion option                                               700,000 (300,000)                        
Liability of put option                                                                   1,200,000      
Business acquisition in interest expense         100,000 100,000 100,000                                                            
Business acquisition in tax benefit 3,435,000 (1,533,000) 4,498,000 (507,000) 600,000 600,000 1,000,000                                                            
Amortization charges from acquired intangible assets $ 4,100,000 $ 4,400,000 $ 7,900,000 $ 8,800,000       $ 800,000 $ 500,000 $ 1,600,000