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EARNINGS PER SHARE - Summary of Numerator and Denominators Used in Computation of Earnings Per Share (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Numerator:          
Net income (loss) attributable to common stockholders $ 7,537 $ 2,296 $ 5,125 $ (5,951)  
Number of shares outstanding, end of period:          
Unvested restricted stock (in shares) (109,000) (127,000) (109,000) (127,000)  
Effect of weighted average shares outstanding (in shares) (2,000) (29,000) (210,000) (279,000)  
Basic weighted average common shares outstanding (in shares) 41,377,000 40,810,000 41,169,000 40,560,000  
Impact of potentially dilutive securities:          
Dilutive effect of stock options and restricted and other stock awards (in shares) 910,000 473,000 727,000 0  
Diluted weighted average common shares outstanding (in shares) 42,287,000 41,283,000 41,896,000 40,560,000  
Antidilutive potentially issuable shares (in shares) 322,000 665,000 322,000 2,157,000  
Class A Common Stock          
Number of shares outstanding, end of period:          
Common stock, outstanding shares (in shares) 40,500,000 39,978,000 40,500,000 39,978,000 40,064,000
Class B Common Stock          
Number of shares outstanding, end of period:          
Common stock, outstanding shares (in shares) 988,000 988,000 988,000 988,000 988,000