Goodwill and Other Intangible Assets Goodwill and Other Intangilbe Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Balance, December 31, 2014	$ 1,720,479		$ 208,743
Goodwill, Impairment Loss	7,901
Balance, March 31, 2015	$ 1,728,380	[1]	$ 208,743

[1] The increase in goodwill for the Community Banking segment and National Lending segment compared to March 31, 2014, was due primarily to $1.5 billion from the CapitalSource Inc. merger.