Annual report pursuant to Section 13 and 15(d)

Acquisitions - Pro Forma Financial Information (Detail)

v3.6.0.2
Acquisitions - Pro Forma Financial Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]      
Amortization of finite-lived intangible assets $ 24,500 $ 22,000 $ 20,700
Total revenue 578,985 534,625  
Net income (loss) $ 16,065 $ (12,075)  
Net income (loss) per share attributable to common stockholders:      
Basic (in dollars per share) $ 0.21 $ (0.16)  
Acquired Intangible Assets      
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]      
Amortization of finite-lived intangible assets $ (1,400) $ (7,300)