Share Repurchases (Details) - USD ($)	6 Months Ended	24 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jul. 31, 2016
Equity [Abstract]
Maximum stock repurchase program amount			$ 200,000,000
Stock repurchased during period (in Shares)	0	1,800,000
Average price per share of stock repurchased (in Dollars per share)		$ 24.89
Remaining repurchase authorization	$ 155,000,000	$ 155,000,000