Fair Value of Assets and Liabilities Quantitative Information about Level 3 Fair Value Measurements (Details) (Nonrecurring Measurements, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Quantitative Information About Level 3 Fair Value Measurements
Fair Value	$ 29,558		$ 36,949
Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value	29,558		36,949
Other real estate owned | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value	10,888		13,983
Other real estate owned | Cost Approach | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value			93
Other real estate owned | Sales Comparison Approach | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value	9,278		11,787
Other real estate owned | Combined Approach | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value	1,610		2,103
Other real estate owned | Minimum Range | Cost Approach | Level 3
Unobservable Inputs
Selling Costs			7.00%	[1]
Other real estate owned | Minimum Range | Sales Comparison Approach | Level 3
Unobservable Inputs
Selling Costs	7.00%	[1]	7.00%	[1]
Adjustment to Comparables	0.00%	[1]	0.00%	[1]
Other real estate owned | Minimum Range | Combined Approach | Level 3
Unobservable Inputs
Selling Costs	5.00%	[1]	5.00%	[1]
Discount Rate	8.50%	[1]	25.00%	[1]
Adjustment to Comparables	25.00%	[1]	0.00%	[1]
Other real estate owned | Maximum Range | Cost Approach | Level 3
Unobservable Inputs
Selling Costs			7.00%	[1]
Other real estate owned | Maximum Range | Sales Comparison Approach | Level 3
Unobservable Inputs
Selling Costs	10.00%	[1]	14.00%	[1]
Adjustment to Comparables	37.50%	[1]	37.00%	[1]
Other real estate owned | Maximum Range | Combined Approach | Level 3
Unobservable Inputs
Selling Costs	10.00%	[1]	8.00%	[1]
Discount Rate	8.50%	[1]	25.00%	[1]
Adjustment to Comparables	25.00%	[1]	30.00%	[1]
Other real estate owned | Weighted Average Range | Cost Approach | Level 3
Unobservable Inputs
Selling Costs			7.00%	[1]
Other real estate owned | Weighted Average Range | Sales Comparison Approach | Level 3
Unobservable Inputs
Selling Costs	7.70%	[1]	7.90%	[1]
Adjustment to Comparables	1.40%	[1]	11.70%	[1]
Other real estate owned | Weighted Average Range | Combined Approach | Level 3
Unobservable Inputs
Selling Costs	7.50%	[1]	6.60%	[1]
Discount Rate	8.50%	[1]	25.00%	[1]
Adjustment to Comparables	25.00%	[1]	7.70%	[1]
Collateral-dependent Impaired Loans, Net of ALLL | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value	18,670		22,966
Collateral-dependent Impaired Loans, Net of ALLL | Cost Approach | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value			84
Collateral-dependent Impaired Loans, Net of ALLL | Income Approach | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value	4,076		5,509
Collateral-dependent Impaired Loans, Net of ALLL | Sales Comparison Approach | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value	11,784		12,878
Collateral-dependent Impaired Loans, Net of ALLL | Combined Approach | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value	$ 2,810		$ 4,495
Collateral-dependent Impaired Loans, Net of ALLL | Minimum Range | Cost Approach | Level 3
Unobservable Inputs
Selling Costs			8.00%	[1]
Collateral-dependent Impaired Loans, Net of ALLL | Minimum Range | Income Approach | Level 3
Unobservable Inputs
Selling Costs	8.00%	[1]	8.00%	[1]
Discount Rate	8.30%	[1]	0.00%	[1]
Collateral-dependent Impaired Loans, Net of ALLL | Minimum Range | Sales Comparison Approach | Level 3
Unobservable Inputs
Selling Costs	0.00%	[1]	0.00%	[1]
Adjustment to Comparables	0.00%	[1]	0.00%	[1]
Collateral-dependent Impaired Loans, Net of ALLL | Minimum Range | Combined Approach | Level 3
Unobservable Inputs
Selling Costs	0.00%	[1]	8.00%	[1]
Discount Rate	7.30%	[1]	8.00%	[1]
Adjustment to Comparables	10.00%	[1]	0.00%	[1]
Collateral-dependent Impaired Loans, Net of ALLL | Maximum Range | Cost Approach | Level 3
Unobservable Inputs
Selling Costs			8.00%	[1]
Collateral-dependent Impaired Loans, Net of ALLL | Maximum Range | Income Approach | Level 3
Unobservable Inputs
Selling Costs	8.00%	[1]	10.00%	[1]
Discount Rate	8.30%	[1]	8.30%	[1]
Collateral-dependent Impaired Loans, Net of ALLL | Maximum Range | Sales Comparison Approach | Level 3
Unobservable Inputs
Selling Costs	10.00%	[1]	16.00%	[1]
Adjustment to Comparables	1.00%	[1]	12.00%	[1]
Collateral-dependent Impaired Loans, Net of ALLL | Maximum Range | Combined Approach | Level 3
Unobservable Inputs
Selling Costs	8.00%	[1]	10.00%	[1]
Discount Rate	7.30%	[1]	8.00%	[1]
Adjustment to Comparables	50.00%	[1]	36.00%	[1]
Collateral-dependent Impaired Loans, Net of ALLL | Weighted Average Range | Cost Approach | Level 3
Unobservable Inputs
Selling Costs			8.00%	[1]
Collateral-dependent Impaired Loans, Net of ALLL | Weighted Average Range | Income Approach | Level 3
Unobservable Inputs
Selling Costs	8.00%	[1]	8.20%	[1]
Discount Rate	8.30%	[1]	6.30%	[1]
Collateral-dependent Impaired Loans, Net of ALLL | Weighted Average Range | Sales Comparison Approach | Level 3
Unobservable Inputs
Selling Costs	7.90%	[1]	8.60%	[1]
Adjustment to Comparables	0.00%	[1]	1.60%	[1]
Collateral-dependent Impaired Loans, Net of ALLL | Weighted Average Range | Combined Approach | Level 3
Unobservable Inputs
Selling Costs	7.80%	[1]	8.40%	[1]
Discount Rate	7.30%	[1]	8.00%	[1]
Adjustment to Comparables	18.90%	[1]	17.60%	[1]

[1] The range for selling costs and adjustments to comparables indicate reductions to the fair value.