Fair Value Measurement (Details 5) (Fair Value, Inputs, Level 3 [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Carrying Value [Member]
Financial assets:
Other Investments, fair value disclosure	$ 31,221	$ 22,351
Investment in Unconsolidated Subsidiaries, fair value disclosure	89,191	87,483
BOLI, fair value disclosure	52,070	52,651
Other Assets, fair value disclosure	11,638	9,636
Financial liabilities:
Other liabilities, fair value disclosure	14,052	15,076
Estimated Fair Value [Member]
Financial assets:
Other Investments, fair value disclosure	38,494	28,226
Investment in Unconsolidated Subsidiaries, fair value disclosure	97,426	96,443
BOLI, fair value disclosure	52,070	52,651
Other Assets, fair value disclosure	11,561	9,636
Financial liabilities:
Other liabilities, fair value disclosure	13,968	14,946
Trust Preferred Securities Due 2034 [Member] | Carrying Value [Member]
Financial liabilities:
Notes payable, fair value disclosure	0	22,992
Trust Preferred Securities Due 2034 [Member] | Estimated Fair Value [Member]
Financial liabilities:
Notes payable, fair value disclosure	0	22,992
Surplus Notes Due 2034 [Member] | Carrying Value [Member]
Financial liabilities:
Notes payable, fair value disclosure	0	12,000
Surplus Notes Due 2034 [Member] | Estimated Fair Value [Member]
Financial liabilities:
Notes payable, fair value disclosure	0	12,000
Note Payable Due 2012 [Member] | Carrying Value [Member]
Financial liabilities:
Notes payable, fair value disclosure	0	515
Note Payable Due 2012 [Member] | Estimated Fair Value [Member]
Financial liabilities:
Notes payable, fair value disclosure	$ 0	$ 519