Fair Value Measurement (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Mortgage Servicing Rights	$ 18,937	$ 22,011	$ 22,760	$ 21,316
Mortgage Servicing rights Valuation Allowance	(399)	(955)	(282)	$ (2,564)
MSRs, net carrying balance	18,538	21,056	22,478
Mortgage Servicing Rights (MSR) Impairment (Recovery)	(556)	673	$ (2,282)
Impaired Collateral Dependant Loans, Recorded Investment	84,300	60,300
Determination Of Specific Allowance For Loan Losses	(12,900)	(4,300)
Collateral Dependant Impaired and Non Accrual Loans Carrying Amount	71,400	56,000
Impairment of Other Real Estate Owned	4,500	2,600
Impairment of Covered Other Real Esate Owned	$ 600	$ 1,200
Percent of available for sale securities classified as level 2	91.00%
Percentage of Level 3 investments in available for sale investment portfolio	9.00%
True up liability, discount period	10 years
True-up Liabitlity Discount Rate	3.77%	3.36%
True-up Liability Effect of Change in Discount Rate Increase By One Percent	$ 600	$ (700)
Number of loans that were 90 days or more past due, or were any on nonaccrual status	0
Time period for non-payment of loans that are placed on non-accrual status	90 days
Midwest
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percent of FDIC Intrinsic Loss Estimate	20.00%
Intrinsic Loss Estimate of the FDIC	$ 152,000
Percent of Asset Premium Paid	25.00%
Asset Premium Paid	$ 21,000
Percent of cumulative shared loss payments under loss sharing agreements	25.00%
Estimated fair value of true up liability	$ 9,300	8,500
George Washington
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Percent of cumulative shared loss payments under loss sharing agreements	25.00%
Estimated fair value of true up liability	$ 5,500	$ 4,800
Percent of excess threshold paid by the Bank under loss sharing agreements	50.00%
Percent Theshold of Loss Sharing Agreements Paid by Bank	20.00%
Stated Threshold of Loss Sharing Agreements Paid by Bank	$ 34,400
Percent of Asset Discount Under Loss Sharing Percent of Asset Discount Under Loss Sharing Agreements	25.00%
Stated amount of Asset Discount Under Loss Sharing Agreements	$ 12,000