Annual report pursuant to Section 13 and 15(d)

Acquisitions - Pro Forma Financial Information (Detail)

v3.3.1.900
Acquisitions - Pro Forma Financial Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2012
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]      
Amortization of finite-lived intangible assets $ 22,000 $ 20,700 $ 16,600
Revenue:      
On demand 456,082 403,373  
On premise 2,970 3,094  
Professional and other 14,588 10,835  
Total revenue 473,640 417,302  
Net income (loss) $ (10,035) $ (13,346)  
Net income (loss) per share attributable to common stockholders      
Basic (in dollars per share) $ (0.13) $ (0.17)  
Diluted (in dollars per share) $ (0.13) $ (0.17)  
Acquired Intangible Assets | Acquisition-related Costs      
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]      
Amortization of finite-lived intangible assets $ 2,500 $ 6,500