Stockholders' Equity (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Treasury Stock, Shares, Acquired	180,822	493,890	351,640
Treasury Stock Acquired, Average Cost Per Share	$ 46.46	$ 45.16	$ 38.5
Capitalsource, Inc. [Member]
Proceeds from (Repurchase of) Equity	$ 58,000	$ 115,000
Repurchased common stock from dividend reinvestment program	1,300	2,583