Quantitative Information about Level 3 Fair Value Measurements (Details) - Non-Recurring Measurements - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2015	Dec. 31, 2014
Quantitative Information About Level 3 Fair Value Measurements
Fair Value		$ 17,213	$ 18,480
Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value		17,213	18,480
Other real estate owned | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value		5,021	3,000
Other real estate owned | Sales Comparison Approach | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value		1,479	2,393
Other real estate owned | Combined Approach | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value		$ 3,542	$ 607
Other real estate owned | Minimum Range | Sales Comparison Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	7.00%	0.00%
Adjustment to Comparables	[1]		0.00%
Other real estate owned | Minimum Range | Combined Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	8.00%	10.00%
Discount Rate	[1]		10.00%
Other real estate owned | Maximum Range | Sales Comparison Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	10.00%	10.00%
Adjustment to Comparables	[1]		7.00%
Other real estate owned | Maximum Range | Combined Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	8.00%	10.00%
Discount Rate	[1]		10.00%
Other real estate owned | Weighted Average Range | Sales Comparison Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	7.40%	5.80%
Adjustment to Comparables	[1]		0.50%
Other real estate owned | Weighted Average Range | Combined Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	8.00%	10.00%
Discount Rate	[1]		10.00%
Collateral-dependent Impaired Loans, Net of ALLL | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value		$ 12,192	$ 15,480
Collateral-dependent Impaired Loans, Net of ALLL | Sales Comparison Approach | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value		6,179	6,330
Collateral-dependent Impaired Loans, Net of ALLL | Combined Approach | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value		5,760	3,809
Collateral-dependent Impaired Loans, Net of ALLL | Cost Approach | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value		$ 253	6
Collateral-dependent Impaired Loans, Net of ALLL | Income Approach | Level 3
Quantitative Information About Level 3 Fair Value Measurements
Fair Value			$ 5,335
Collateral-dependent Impaired Loans, Net of ALLL | Minimum Range | Sales Comparison Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	0.00%	0.00%
Adjustment to Comparables	[1]	0.00%	0.00%
Collateral-dependent Impaired Loans, Net of ALLL | Minimum Range | Combined Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	10.00%	8.00%
Adjustment to Comparables	[1]	20.00%	10.00%
Collateral-dependent Impaired Loans, Net of ALLL | Minimum Range | Cost Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	0.00%	7.00%
Collateral-dependent Impaired Loans, Net of ALLL | Minimum Range | Income Approach | Level 3
Unobservable Inputs
Selling Costs	[1]		8.00%
Discount Rate	[1]		8.30%
Collateral-dependent Impaired Loans, Net of ALLL | Maximum Range | Sales Comparison Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	10.00%	10.00%
Adjustment to Comparables	[1]	5.00%	30.00%
Collateral-dependent Impaired Loans, Net of ALLL | Maximum Range | Combined Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	10.00%	10.00%
Adjustment to Comparables	[1]	20.00%	20.00%
Collateral-dependent Impaired Loans, Net of ALLL | Maximum Range | Cost Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	10.00%	7.00%
Collateral-dependent Impaired Loans, Net of ALLL | Maximum Range | Income Approach | Level 3
Unobservable Inputs
Selling Costs	[1]		10.00%
Discount Rate	[1]		12.00%
Collateral-dependent Impaired Loans, Net of ALLL | Weighted Average Range | Sales Comparison Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	8.80%	8.30%
Adjustment to Comparables	[1]	0.00%	3.50%
Collateral-dependent Impaired Loans, Net of ALLL | Weighted Average Range | Combined Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	10.00%	9.20%
Adjustment to Comparables	[1]	20.00%	16.20%
Collateral-dependent Impaired Loans, Net of ALLL | Weighted Average Range | Cost Approach | Level 3
Unobservable Inputs
Selling Costs	[1]	5.60%	7.00%
Collateral-dependent Impaired Loans, Net of ALLL | Weighted Average Range | Income Approach | Level 3
Unobservable Inputs
Selling Costs	[1]		8.50%
Discount Rate	[1]		9.10%

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