Investment Securities Investment Securities Carrying Value (Amortized Cost) and Fair Value by remaining period of contractual maturity (Details) - USD ($) $ in Thousands	Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis					$ 4,999
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value					$ 4,998
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Weighted Average Rate					1.52%
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis					$ 12,120
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value					$ 12,184
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Weighted Average Rate					2.05%
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis					$ 36,841
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value					$ 36,830
Available-for-sale Securities, Debt Maturities, after Ten Years, Weighted Average Rate					1.42%
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis					$ 53,960
Available-for-sale	$ 54,012		$ 56,180		$ 54,012
Available-for-sale Securities, Debt Maturities, Weighted Average Rate					1.57%
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount					$ 6,819
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value					$ 7,069
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Weighted Average Rate					3.02%
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount					$ 8,164
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value					$ 8,373
Held-to-maturity Securities, Debt Maturities, after Ten Years, Weighted Average Rate					2.60%
Held-to-maturity, Amortized Cost	14,983	[1]	15,311	[1]	$ 14,983
Held-to-maturity Securities, Fair Value	$ 15,442	[1]	$ 15,653	[1]	$ 15,442
Held-to-maturity Securities, Debt Maturities, Weighted Average Rate					2.78%

[1] * The carrying amount and amortized cost are the same for all held-to-maturity securities, as no OTTI has been recorded.