Investments Maturities of Held to Maturity Securities by Type (Details) (USD $) In Thousands, unless otherwise specified			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 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	[1]
Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value			0	[1]
Held to maturity securities, Maturities, Next Twelve Months, Weighted Average Yield			0.00%	[1]
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount			0	[1]
Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value			0	[1]
Held to maturity securities, Maturities, Year Two Through Five, Weighted Average Yield			0.00%	[1]
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount			0	[1]
Held-to-maturity Securities, Debt Maturities, Year Six Through Ten, Fair Value			0	[1]
Held to maturity securities, Maturities, Year Six Through Ten, Weighted Average Yield			0.00%	[1]
Held-to-maturity Securities, Debt Maturities, after Ten Years, Net Carrying Amount			112,014	[1]
Held-to-maturity Securities, Debt Maturities, after Ten Years, Fair Value			110,917	[1]
Held to maturity Securities, Maturities, After Ten Years, Weighted Average Yield			2.26%	[1]
Held-to-maturity Securities	112,014	0	112,014	[1],[2]
Held-to-maturity Securities, Fair Value	$ 110,917	$ 0	$ 110,917	[1],[2]
Held to maturity securities, Weighted average yield			2.26%	[1]
Weighted Average Remaining Maturity, Held To Maturity Securities	15.4 years	0

[1] Mortgage-backed securities are shown based on their final (contractual) maturity, but, due to prepayments, they are expected to have shorter lives.

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