Equity (Stock Repurchase Program) (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Feb. 15, 2016	Dec. 31, 2015
Stock Repurchase Program
Repurchase of common stock, authorized amount			$ 50,000,000.0
Treasury stock, shares, acquired	5,800	44
Treasury stock value acquired including acquisition costs	$ 58,100,000	$ 600,000
Treasury stock acquired, average cost per share (in dollars per share)	$ 9.94	$ 12.66
Available repurchase of common stock, authorized amount (up to)	$ 40,600,000			$ 48,700,000