Stock-Based Compensation Plans and Employee Benefits - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Options Outstanding, Beginning Balance	2,812	2,961	2,661
Number of Options, Granted	633	557	774
Number of Options, Exercised	(855)	(234)	(154)
Number of Options, Forfeited	(784)	(472)	(320)
Number of Options Outstanding, Ending Balance	1,806	2,812	2,961
Number of Options exercisable	1,038	1,760	1,922
Weighted Average Exercise Price, Beginning balance	$ 20.29	$ 22.48	$ 24.77
Weighted Average Exercise Price, Granted	16.74	19.26	16.61
Weighted Average Exercise Price, Exercised	11.62	12.85	10.02
Weighted Average Exercise Price, Forfeited	29.46	36.51	33.40
Weighted Average Exercise Price, Ending balance	19.16	20.29	22.48
Weighted Average Exercise Price, Options exercisable	$ 20.49	$ 21.69	$ 25.75
Weighted-Average Remaining Contractual Term (Years), Ending Balance	6 years 1 month 6 days
Weighted-Average Remaining Contractual Term (Years), Options exercisable	4 years 6 months	4 years 2 months 12 days	4 years
Aggregate Intrinsic Value, Ending balance	$ 1,608
Aggregate Intrinsic Value, Options exercisable	$ 1,608	$ 6,764	$ 9,077