Past Due Loans, Allowance For Credit Losses, Impaired Loans and TDRS Past Due Loans, Allowance For Credit Losses, Impaired Loans and TDRS (Details) - TDR Rollforward - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance			$ 23,608
Additions	$ 445	$ 23,432	445	$ 23,507
Ending balance	5,137	22,426	5,137	22,426
Accruing
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance	3,067	5,697	3,704	23,770
Additions	120	417	120	492
Net payments received	(355)	(109)	(746)	(1,219)
Returned to performing status	0	0	0	(18,821)
Net transfers from non-accrual	(61)	(556)	(307)	1,227
Ending balance	2,771	5,449	2,771	5,449
Nonaccrual
Troubled Debt Restructuring Activity Rollforward [Roll Forward]
Beginning balance	2,070	1,700	19,904	4,083
Additions	325	23,015	325	23,015
Net payments received	(29)	(135)	(15,483)	(292)
Charge-offs	(61)	(8,159)	(2,687)	(8,345)
Transfers to OREO	0	0	0	(257)
Net transfers to accruing	61	556	307	(1,227)
Ending balance	$ 2,366	$ 16,977	$ 2,366	$ 16,977