Earnings Per Share - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share, amount									786,000	417,000	481,000
Recognition of excess tax benefit due to new standard									$ 29,582	$ 0	$ 0
Diluted weighted average shares outstanding (in shares)	38,975,000	39,062,000	38,738,000	39,071,000	37,864,000	36,349,000	36,097,000	35,895,000	38,961,000	36,552,000	35,401,000