Covered Assets And Indemnification Asset (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 item	Dec. 31, 2011
Business Acquisition [Line Items]
Recaptured provision on covered loans	$ 3.8	$ 3.5
Range of risk rating for loans and leases, minimum	1
Range of risk rating for loans and leases, maximum	10
Evergreen Bank [Member]
Business Acquisition [Line Items]
Outstanding unpaid principal of covered loans	137.7	209.5
Rainier Pacific Bank [Member]
Business Acquisition [Line Items]
Outstanding unpaid principal of covered loans	297.0	379.0
Nevada Security Bank [Member]
Business Acquisition [Line Items]
Outstanding unpaid principal of covered loans	$ 198.4	$ 260.2