Stockholders' Equity - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Feb. 29, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option available for future grants (in shares)		1,600,000		1,600,000
Tax payments, for net share settlement of share based award				$ 2,572,000	$ 1,036,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value price per share (in dollars per share)		$ 25.14		$ 25.14
Total intrinsic value of options exercised				$ 2,600,000	800,000
Number of options outstanding (in shares)		834,000		834,000		1,008,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense related to non-vested stock options		$ 36,600,000		$ 36,600,000
Weighted average period over which costs are recognized				2 years 11 months 12 days
Approximate units outstanding (in shares)		1,923,000		1,923,000		1,330,000
Performance Based Restricted Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approximate units of performance restricted stock granted (in shares)				100,000
Approximate units outstanding (in shares)		200,000		200,000
Maximum additional shares to be issued		200,000		200,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares withheld, for net share settlement of share based award				100,000
Tax payments, for net share settlement of share based award				$ 2,600,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)		200,000		200,000
Unvested performance options (in shares)		29,350		29,350
Unvested shares, expected to vest		25,000		25,000
2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares authorized	2,000,000.0
Outstanding common stock repurchase program authorized amount (up to)							$ 50,000,000.0
Shares repurchased during period		0
Cost of shares repurchased			$ 24,800,000		$ 33,800,000
Average cost of shares repurchased (in dollars per share)			$ 18.92		$ 18.90
Average price of shares repurchased (in dollars per share)			$ 18.89		$ 18.87
Remaining authorized repurchase amount		$ 16,200,000		$ 16,200,000
Rule 10b5-1 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares repurchased during period			1,300,000		1,800,000