Stockholders' Equity (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($) shares
Class of Stock [Line Items]
Stock Repurchased	2,100,000
Treasury Stock, Value, Acquired, Cost Method | $	$ 58.6
Shares Paid for Tax Withholding for Share Based Compensation	3,692
2012 Repurchase Program [Member]
Class of Stock [Line Items]
Maximum number of shares authorized to be repurchased	5,000,000
Stock Repurchased	0