Business Combinations (Merger Related Expense) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Business Acquisition [Line Items]
Total Merger related expense	$ 57,531,000	$ 810,000	$ 63,514,000	$ 2,341,000
Sterling Financial Corporation [Member]
Business Acquisition [Line Items]
Personnel	15,075,000		15,488,000
Legal and professional	8,752,000		13,924,000
Charitable contributions	10,000,000		10,000,000
Investment banking fees	9,573,000		9,573,000
Contract termination	8,853,000		8,853,000
Communication	1,839,000		2,011,000
Other	3,439,000		3,665,000
Total Merger related expense	$ 57,531,000		$ 63,514,000