Fair Value Measurements (Carrying Values And Estimated Fair Values Of Financial Instruments Segregated By The Level Of The Valuation Inputs) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Financial Assets:
Accrued interest receivable	$ 6,365	$ 7,176
Financial Liabilities:
Accrued interest payable	1,116	3,689
Other borrowings	70,362	56,479
Carrying Values [Member] | Level 2 Inputs [Member]
Financial Assets:
Cash and cash equivalents	288,079	30,247
Securities held to maturity	12,797	15,252
Accrued interest receivable	6,365	7,176
Investments included in other assets	8,531	10,454
Financial Liabilities:
Deposits	1,709,578	1,921,382
Accrued interest payable	1,116	3,689
Other liabilities	9,985	9,340
Derivative instrument	3,195	2,834
Other borrowings	70,362	56,479
Subordinated debentures	81,963	81,963
Carrying Values [Member] | Level 3 Inputs [Member]
Financial Assets:
Total loans, net of allowance	1,332,017	1,718,804
Fair Values [Member] | Level 2 Inputs [Member]
Financial Assets:
Cash and cash equivalents	288,079	30,247
Securities held to maturity	13,659	15,885
Accrued interest receivable	6,365	7,176
Investments included in other assets	8,531	10,454
Financial Liabilities:
Deposits	1,666,653	1,883,196
Accrued interest payable	1,116	3,689
Other liabilities	9,985	9,340
Derivative instrument	3,195	2,834
Other borrowings	74,057	60,688
Subordinated debentures	82,998	72,423
Fair Values [Member] | Level 3 Inputs [Member]
Financial Assets:
Total loans, net of allowance	$ 1,301,942	$ 1,708,894