Stockholders' Equity - Share Repurchase Programs - Additional Information (Details) - USD ($) shares in Millions	1 Months Ended			3 Months Ended	7 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Oct. 31, 2013	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jul. 31, 2014	Dec. 04, 2013
Share Repurchases Program [Line Items]
Shares repurchase authorized amount									$ 200,000,000
Purchase of common stock, shares			27.4
Purchase of common stock, value						$ 105,288,000	$ 64,762,000	$ 487,180,000
Payments for repurchase of common stock						$ 89,953,000	$ 49,981,000	$ 505,898,000
Accelerated Share Repurchase Agreements
Share Repurchases Program [Line Items]
Shares repurchase authorized amount										$ 114,600,000
Purchase of common stock, shares	1.5	8.0		1.5	9.5		1.5	8.0
Payments for repurchase of common stock		$ 114,600,000
2014 Stock Repurchase Program
Share Repurchases Program [Line Items]
Purchase of common stock, shares						7.0	3.8	45.2
Purchase of common stock, value						$ 90,000,000	$ 50,000,000	$ 502,300,000
Share repurchase plan, remaining authorized amount						$ 60,100,000
Return of Capital Program
Share Repurchases Program [Line Items]
Shares repurchase authorized amount										$ 400,000,000