Securities (Investments Classified by Contractual Maturity Date) (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale, total	$ 122,524
Estimated fair value, available for sale, total	119,976
Amortized cost, held to maturity, total	96,271
Estimated fair value, held to maturity, total	93,745
Asset-backed securities issued by GSEs [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, available for sale, within one year	19,719
Amortized cost, available for sale, over one year through five years	59,732
Amortized cost, available for sale, over five years through ten years	33,788
Amortized cost, available for sale, after ten years	9,285
Amortized cost, available for sale, total	122,524
Estimated fair value, available for sale, within one year	19,309
Estimated fair value, available for sale, over one year through five years	58,490
Estimated fair value, available for sale, over five years through ten years	33,085
Estimated fair value, available for sale, after ten years	9,092
Estimated fair value, available for sale, total	119,976
Amortized cost, held to maturity, within one year	19,862
Amortized cost, held to maturity, over one year through five years	41,013
Amortized cost, held to maturity, over five years through ten years	22,422
Amortized cost, held to maturity, after ten years	11,975
Amortized cost, held to maturity, total	95,272
Estimated fair value, held to maturity, within one year	23,965
Estimated fair value, held to maturity, over one year through five years	37,408
Estimated fair value, held to maturity, over five years through ten years	20,451
Estimated fair value, held to maturity, after ten years	10,922
Estimated fair value, held to maturity, total	92,746
US Government Obligations [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Amortized cost, held to maturity, within one year	999
Estimated fair value, held to maturity, within one year	$ 999