Securities (Trading Securities (and Certain Trading Assets)) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2015	Dec. 31, 2014
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale		$ 38,300
Estimated fair value, available for sale	$ 38,378	41,939
Amortized cost, held to maturity	85,985	84,506
Gross unrealized gains, held to maturity	993	1,146
Gross unrealized losses, held to maturity	763	737
Estimated fair value, held to maturity	86,215	84,915
Asset Backed Securities Issued By Others [Member] \| US Government Obligations [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, held to maturity	750	850
Estimated fair value, held to maturity	750	850
Asset Backed Securities Issued By Others [Member] \| Debt Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, held to maturity	85,235	83,656
Gross unrealized gains, held to maturity	993	1,146
Gross unrealized losses, held to maturity	763	737
Estimated fair value, held to maturity	85,465	84,065
Asset Backed Securities Issued By Others [Member] \| Residential Collateralized Mortgage Obligations [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, held to maturity	1,271	1,472
Gross unrealized losses, held to maturity	114	112
Estimated fair value, held to maturity	1,157	1,360
Asset Backed Securities Issued By GSEs [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale	38,873	42,563
Gross unrealized gains, available for sale	178	206
Gross unrealized losses, available for sale	673	830
Estimated fair value, available for sale	38,378	41,939
Asset Backed Securities Issued By GSEs [Member] \| Bond Mutual Funds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale	4,243	4,199
Gross unrealized gains, available for sale	106	122
Estimated fair value, available for sale	4,349	4,321
Asset Backed Securities Issued By GSEs [Member] \| Corporate Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale	37	37
Gross unrealized gains, available for sale	3	3
Estimated fair value, available for sale	40	40
Asset Backed Securities Issued By GSEs [Member] \| Residential Collateralized Mortgage Obligations [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale	34,568	38,294
Gross unrealized gains, available for sale	64	77
Gross unrealized losses, available for sale	673	830
Estimated fair value, available for sale	33,959	37,541
Amortized cost, held to maturity	66,087	62,683
Gross unrealized gains, held to maturity	392	379
Gross unrealized losses, held to maturity	591	580
Estimated fair value, held to maturity	65,888	62,482
Asset Backed Securities Issued By GSEs [Member] \| Residential Mortgage Backed Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale	25	33
Gross unrealized gains, available for sale	5	4
Estimated fair value, available for sale	30	37
Amortized cost, held to maturity	17,877	19,501
Gross unrealized gains, held to maturity	601	767
Gross unrealized losses, held to maturity	58	45
Estimated fair value, held to maturity	$ 18,420	$ 20,223

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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