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Stockholders' Equity - Additional Information (Detail) (USD $)	6 Months Ended		0 Months Ended	6 Months Ended	0 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 2013 Program	Sep. 06, 2013 2013 Program Maximum	Jun. 30, 2014 Long Term Incentive Plan	Jul. 23, 2014 Subsequent Event Dividend Declared
Stockholders Equity Note [Line Items]
Dividend declaration date					Jul. 23, 2014
Dividend per share, declared					$ 0.10
Dividend payment date					Sep. 24, 2014
Dividend record date					Sep. 10, 2014
Amount approved for repurchases under stock buyback program			$ 200,000,000
Remaining Amount approved for repurchases under stock buyback program	187,000,000
Treasury stock shares acquired		13,898		536,630
Treasury stock shares acquired, fair vale	$ 18,147,000	$ 466,000		$ 17,681,000

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Aggregate dividends declared during the period for each share of common stock outstanding.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

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Date the declared dividend will be paid, in CCYY-MM-DD format.

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Date the dividend to be paid was declared, in CCYY-MM-DD format.

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Amount of a stock repurchase plan authorized by an entity's Board of Directors.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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