Investments Maturities of HTM Securities (Details) - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount		$ 14,975
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount		0
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount		14,327
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount		69,722
Held-to-maturity Securities		99,024	$ 93,079
Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value		14,971
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value		0
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value		14,300
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value		69,442
Held-to-maturity Securities, Fair Value		98,713	92,604
Mortgage Backed Securities, Other [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities	[1]	84,049	93,079
Held-to-maturity Securities, Fair Value	[1]	$ 83,742	$ 92,604

[1] All mortgage-backed securities are guaranteed by U.S. government agencies or government-sponsored entities.