Stockholders' Equity - Additional Information (Detail) (USD $)	9 Months Ended				0 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 Long Term Incentive Plan	Sep. 30, 2014 2013 Program	Sep. 06, 2013 2013 Program Maximum	Oct. 23, 2014 Subsequent Event Dividend Declared
Stockholders Equity Note [Line Items]
Dividend declaration date					Oct. 22, 2014
Dividend per share, declared					$ 0.10
Dividend payment date					Dec. 24, 2014
Dividend record date					Dec. 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		536,630	13,898
Treasury stock shares acquired, fair value	$ 18,147,000	$ 17,681,000	$ 466,000