Investments Maturities of HTM Securities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Fair Value	$ 127,719		$ 110,917
Mortgage Backed Securities, Other [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount	0
Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value	0
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	0
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value	0
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount	127,938
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value	127,719
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis	127,938
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	0
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value	0
Held-to-maturity Securities, Fair Value	$ 127,719	[1]	$ 110,917	[1]

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