Business Combinations (Statement of Assets Acquired and Liabilities Assumed at Estimated Fair Values) (Details) (USD $) In Thousands, unless otherwise specified				0 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 18, 2014 Sterling Financial Corporation [Member]	Oct. 02, 2013 Financial Pacific Holding Corp [Member]	Jul. 02, 2013 Financial Pacific Holding Corp [Member]
Fair value of consideration:
Cash				$ 136,200		$ 156,110
Liability recorded for warrants' cash payment per share				6,453
Fair value of common shares issued				1,939,497	1,900
Fair value of warrants, common stock options, and restricted stock exchanged				50,317
Total consideration				2,132,467	158,000
Fair value of assets acquired:
Cash and equivalents				253,067		6,452
Investment securities				1,378,300
Loans held for sale				215,208
Non-covered loans and leases, net				7,122,989		264,336
Premises and equipment				124,881		491
Residential mortgage servicing rights				62,770
Other intangible assets				54,562
Non-covered other real estate owned				8,140
Bank owned life insurance				193,246
Deferred tax asset				295,371
Accrued interest receivable				23,553
Other assets				147,338		8,015
Total assets acquired				9,879,425		279,294
Fair value of liabilities assumed:
Deposits				7,086,052
Securities sold under agreements to repurchase				584,746
Term debt				854,737		211,204
Junior subordinated debentures				156,171
Other liabilities				80,679		8,757
Total liabilities assumed				8,762,385		219,961
Net assets acquired				1,117,040		59,333
Goodwill	$ 1,779,732	$ 764,305	$ 668,172	$ 1,015,427		$ 96,777