Common Stock Common Stock (Preferred Stock Issuance) (Details) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
	Jun. 19, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Common Stock (Preferred Stock) [Abstract]
Depositary shares issued	6,000,000
Preferred stock, shares issued	6,000	6,000		6,000
Preferred stock, par value	$ 1.00	$ 0		$ 1.00
Preferred Stock, Liquidation Preference, Value	$ 150,000
Preferred Stock, Liquidation Preference Per Share	$ 25.00
Proceeds from issuance of preferred stock	$ 144,800	$ 0	$ 144,784