Investments Schedule of Available for sale Securities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 694,832		$ 690,556
Available-for-sale Securities, Gross Unrealized Gains	4,535		9,851
Available-for-sale Securities, Gross Unrealized Losses	7,638		1,107
Available-for-sale Securities	691,729		699,300
Held-to-maturity Securities	112,014		0
Held-to-maturity Securities, Unrecognized Holding Gain	15
Held-to-maturity Securities, Unrecognized Holding Loss	(1,112)
Held-to-maturity Securities, Fair Value	110,917		0
US Government and Government Agencies and Authorities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	2,300		2,781
Available-for-sale Securities, Gross Unrealized Gains	15		0
Available-for-sale Securities, Gross Unrealized Losses	27		28
Available-for-sale Securities	2,288		2,753
US Government-sponsored Enterprises Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	228,670		154,058
Available-for-sale Securities, Gross Unrealized Gains	301		962
Available-for-sale Securities, Gross Unrealized Losses	1,031		18
Available-for-sale Securities	227,940		155,002
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	218,900		207,952
Available-for-sale Securities, Gross Unrealized Gains	1,431		3,172
Available-for-sale Securities, Gross Unrealized Losses	1,898		140
Available-for-sale Securities	218,433		210,984
Mortgage Backed Securities, Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	229,609	[1],[2]	313,239	[1]
Available-for-sale Securities, Gross Unrealized Gains	2,513	[1]	5,597	[1]
Available-for-sale Securities, Gross Unrealized Losses	4,678	[1]	909	[1]
Available-for-sale Securities	227,444	[1],[2]	317,927	[1]
Held-to-maturity Securities	112,014	[1],[2]
Held-to-maturity Securities, Unrecognized Holding Gain	15	[1]
Held-to-maturity Securities, Unrecognized Holding Loss	(1,112)	[1]
Held-to-maturity Securities, Fair Value	110,917	[1],[2]
Other Aggregated Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	15,353	[3]	12,526
Available-for-sale Securities, Gross Unrealized Gains	275		120
Available-for-sale Securities, Gross Unrealized Losses	4		12
Available-for-sale Securities	$ 15,624	[3]	$ 12,634

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

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

[3] Other securities consist of money market mutual funds and equity securities held at certain non-bank affiliates.