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Stockholders' Equity - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Nov. 05, 2015
Jun. 06, 2012
Jan. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Equity [Abstract]            
Board of Directors authorized stock repurchase program $ 50,000,000 $ 250,000,000        
Number of shares that have been repurchased and retired during the period       764,545 0 1,956,900
Average price per share       $ 34.68   $ 36.35
Value of shares that have been repurchased and retired during the period       $ 26,532,000   $ 71,130,000
Stock repurchase program, period 6 months 2 years        
Payment for share repurchase     $ 4,400,000 $ 26,532,000 $ 4,367,000 66,763,000
Accrued liability related to repurchase of share           $ 4,400,000