Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

+ References

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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No definition available.

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Unrecognized cost of unvested options awarded to employees as compensation.

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No definition available.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Equity-Based Compensation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Option Indexed to Issuer's Equity
Intrinsic value of stock options exercised	$ 5,900	$ 400	$ 10,900
Cash received from options exercised		473	5,563	$ 7,942
Actual tax benefit realized for the tax deductions from option exercises	2,300	0	4,200
Unrecognized compensation expense related to stock options		7,000
Stock option
Option Indexed to Issuer's Equity
Recognized compensation expense	2,000	$ 3,400	1,900
Recognized weighted-average period		2 years 4 months 13 days
Restricted Stock
Option Indexed to Issuer's Equity
Number of share vested during period		91,127
Recognized compensation expense	$ 1,000	$ 500	$ 5,500
Recognized weighted-average period		2 years 2 months 19 days
Total unrecognized compensation expense		$ 7,500
2011 Incentive Compensation Plan
Option Indexed to Issuer's Equity
Common Stock, Capital Shares Reserved for Future Issuance		5,990,943