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Stockholders' Equity and Stock-Based Compensation - Summary of Restricted Stock Units Relating to 2013 Incentive Plan (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended	6 Months Ended
	Apr. 07, 2014	Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Nonvested Restricted Stock Units, Beginning Balance		145,517
Nonvested Restricted Stock Units, Granted	217,839	217,839
Nonvested Restricted Stock Units, Vested		(51,598)
Nonvested Restricted Stock Units, Forfeited		(1,566)
Nonvested Restricted Stock Units, Ending Balance		310,192
Weighted Average Grant Date Fair Value, Beginning Balance		$ 17.68
Weighted Average Grant Date Fair Value, Granted	$ 16.17	$ 16.17
Weighted Average Grant Date Fair Value, Vested		$ 17.81
Weighted Average Grant Date Fair Value, Forfeited		$ 18.30
Weighted Average Grant Date Fair Value, Ending Balance		$ 16.60
Aggregate Intrinsic Value, Beginning Balance		$ 2,900
Aggregate Intrinsic Value, Granted		3,424
Aggregate Intrinsic Value, Vested
Aggregate Intrinsic Value, Forfeited		25
Aggregate Intrinsic Value, Ending Balance		$ 4,876

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Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited Aggregate Intrinsic Value

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Intrinsic value of equity-based compensation awards not vested. Excludes stock and unit options.

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Intrinsic value of equity-based compensation awards vested. Excludes stock and unit options.

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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(3)

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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