Fair Value Measurements Quantitative information about Level III fair value measurements (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2015	Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Repossessed assets	[1]	$ 1,044	$ 1,132
Impaired Loans [Member] | Discounted appraised value [Member] | Minimum [Member] | Level III [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate		0.00%	0.00%
Impaired Loans [Member] | Discounted appraised value [Member] | Maximum [Member] | Level III [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate		100.00%	100.00%
Impaired Loans [Member] | Discounted appraised value [Member] | Weighted Average [Member] | Level III [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate		5.00%	7.00%
Repossessed Assets [Member] | Market Approach Valuation Technique [Member] | Weighted Average [Member] | Level III [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate		50.00%	50.00%
Nonrecurring [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired Loans, Fair Value		$ 7,808	$ 5,799
Nonrecurring [Member] | Level III [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired Loans, Fair Value		4,652	4,510
Repossessed assets	[1]	$ 1,044	$ 1,132

[1] Included in other assets on the consolidated balance sheets.