Stockholders' Equity - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended
	May. 31, 2013	Mar. 31, 2016	Mar. 31, 2015	Feb. 29, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option available for future grants (in shares)		1,000,000
Tax payments, for net share settlement of share based award		$ 744,000	$ 194,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense related to non-vested stock options		$ 20,500,000
Weighted average period over which costs are recognized		2 years 8 months 12 days
Approximate units outstanding (in shares)		1,271,000			1,139,000
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
Maximum additional shares to be issued		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		42,500
Tax payments, for net share settlement of share based award		$ 700,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value price per share (in dollars per share)		$ 19.63
Total intrinsic value of options exercised		$ 100,000	$ 2,100,000
Number of options outstanding (in shares)		1,097,000			1,103,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)		200,000
Unvested performance options (in shares)		30,600
Unvested shares, expected to vest		25,000
2013 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares authorized	1,600,000
2014 Stock Repurchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding common stock repurchase program authorized amount (up to)				$ 50,000,000.0
Shares repurchased during period		500,000
Cost of shares repurchased		$ 9,000,000
Average cost of shares repurchased (in dollars per share)		$ 18.86
Average price of shares repurchased (in dollars per share)		$ 18.83
Remaining authorized repurchase amount		$ 41,000,000