Stockholders' Equity (Deficit) (Details) - USD ($)	1 Months Ended	12 Months Ended
	Aug. 31, 2017	Dec. 31, 2017	Jul. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stockholders' Equity (Deficit) [Abstract]
Common Stock, Shares Authorized		1,500,000,000		1,500,000,000	1,500,000,000
Common Stock, Par or Stated Value Per Share		$ 0.01		$ 0.01	$ 0.01
Preferred Stock, Shares Authorized		150,000,000		150,000,000	150,000,000
Preferred Stock, Par or Stated Value Per Share		$ 0.01		$ 0.01	$ 0.01
Common Stock, Shares, Issued		197,615,064		196,524,010
Common shares outstanding (in shares)		195,522,290		196,524,010
Preferred Stock, Shares Outstanding		0		0
Stock Repurchase Program, Authorized Amount			$ 50,000,000
Repurchases of common stock (in shares)	2,100,000
Treasury Stock Acquired, Average Cost Per Share	$ 23.89
Treasury Stock, Value, Acquired, Cost Method	$ 50,000,000	$ 50,000,000