Goodwill and Other Intangible Assets Goodwill and Other Intangilbe Assets (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Goodwill [Roll Forward]
Balance, December 31, 2014	$ 1,720,479,000		$ 1,720,479,000
Adjustment to acquired CapitalSource Inc. deferred tax assets	$ 7,901,000	$ (6,600,000)	0	$ 0
Balance, June 30, 2015			$ 1,728,380,000