Common Stock and Share-Based Compensation - Additional Information (Detail) - USD ($)	1 Months Ended		3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock, shares authorized (in shares)	1,000,000		1,000,000
Common stock, shares authorized (in shares)	250,000,000		250,000,000
Common stock, par value (in dollars per share)	$ 0.01		$ 0.01		$ 0.01
Dividends paid (in dollars per share)	0.09	$ 0.09
Cash dividends paid			$ 8,178,000	$ 8,259,000
Quarterly dividends expected (in dollars per share)	$ 0.09
Annual dividends expected (in dollars per share)			$ 0.36
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized amount for common share repurchase threshold	$ 2,380,000,000.00		$ 2,380,000,000.00
Repurchase of common stock (in shares)			0	0
Remaining authorized amount for common share repurchase	$ 197,100,000		$ 197,100,000