Investments (Aggregate Carrying And Approximate Market Values Of Held-To-Maturity Securities) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity, Amortized Cost	$ 13,444	$ 23,458
Securities held-to-maturity, Gross Unrealized Gains	283	675
Securities held-to-maturity, Gross Unrealized Losses	69	710
Securities held-to-maturity, Estimated Fair Value	13,658	23,423
Trust Preferred Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity, Amortized Cost	13,444	23,458
Securities held-to-maturity, Gross Unrealized Gains	283	675
Securities held-to-maturity, Gross Unrealized Losses	69	710
Securities held-to-maturity, Estimated Fair Value	13,658	23,423
Other Investment Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity, Amortized Cost	11,459	11,934
Securities held-to-maturity, Estimated Fair Value	11,459	11,934
Non-Marketable Equity Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity, Amortized Cost	11,459	11,934
Securities held-to-maturity, Estimated Fair Value	$ 11,459	$ 11,934