Stock-Based Compensation - Additional Information (Detail) - USD ($)		3 Months Ended			9 Months Ended
	Jan. 28, 2016	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2013	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issued					22,432
Fair value of common stock issued					$ 500,000
Common stock, shares issued		86,249			86,249		85,459
Compensation expense		$ 6,100,000	$ 5,400,000		$ 19,900,000	$ 16,800,000
2006 EIP and 2013 LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock issued					662,682
Unrecorded and unrecognized compensation expense related to unvested share based compensation stock options		600,000	3,600,000		$ 600,000	3,600,000
Unrecorded and unrecognized compensation expense related to unvested share based compensation on restricted stock, Recognition period					1 year 1 month 6 days
2013 LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecorded and unrecognized compensation expense related to unvested share based compensation on restricted stock, Recognition period					2 years 4 months 24 days
Unrecorded and unrecognized compensation expense related to unvested share based compensation on restricted stock		$ 40,800,000	46,300,000		$ 40,800,000	46,300,000
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based payment award vesting period					4 years
Vesting Award [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage					25.00%
Time Vested Restricted Stock And Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based payment award vesting period					3 years 4 months 24 days
Shares issued					425,750
Fair value at the date of grant					$ 9,600,000
Awards vested					449,824
Awards outstanding		366,695			366,695
Shares issued in settlement of related payroll taxes					83,129
Time Vested Restricted Stock And Restricted Stock Units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based payment award vesting period					3 years
Time Vested Restricted Stock And Restricted Stock Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based payment award vesting period					4 years
Performance-Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based payment award vesting period					2 years 4 months 24 days
Shares issued					214,500
Fair value at the date of grant					$ 4,800,000
Performance-Based Restricted Stock Units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contingent right to receive common stock shares					0
Performance-Based Restricted Stock Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contingent right to receive common stock shares					1.75
Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized				1,000,000
Common stock, additional shares authorized	1,000,000
Percentage of annual compensation designated by employees				50.00%
Maximum shares purchasable per person				2,000
Percentage of shares purchase price to market closing price				85.00%
Maximum voting power				5.00%
Maximum stock purchased to fair market value				$ 25,000
Common stock, shares issued		852,347			852,347
Compensation expense		$ 300,000	$ 300,000		$ 1,000,000	$ 1,000,000
Shares issued from the Employee Stock Purchase Plan, shares					294,951
Non-employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based payment award vesting period					1 year
Non-employee Directors [Member] | Initial Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based payment award vesting period					6 months