Loans and Allowance for Loan Losses (Troubled Debt Restructurings That Subsequently Defaulted) (Details) (Troubled Debt Restructurings That Subsequently Defaulted [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012 Contract		Jun. 30, 2011 Contract		Jun. 30, 2012 Contract		Jun. 30, 2011 Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts	25	[1],[2]	54	[1],[2]	39	[1],[3]	71	[1],[3]
Recorded Investment	$ 21,723	[1],[2]	$ 55,633	[1],[2]	$ 48,859	[1],[3]	$ 74,359	[1],[3]
Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	[1],[2]	3	[1],[2]	0	[1],[3]	3	[1],[3]
Recorded Investment	0	[1],[2]	1,742	[1],[2]	0	[1],[3]	1,742	[1],[3]
Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	[1],[2]	1	[1],[2]	4	[1],[3]	2	[1],[3]
Recorded Investment	1,009	[1],[2]	261	[1],[2]	1,573	[1],[3]	292	[1],[3]
Credit Card Receivable [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	[1],[2]	0	[1],[2]	0	[1],[3]	0	[1],[3]
Recorded Investment	0	[1],[2]	0	[1],[2]	0	[1],[3]	0	[1],[3]
Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0	[1],[2]	3	[1],[2]	0	[1],[3]	3	[1],[3]
Recorded Investment	0	[1],[2]	208	[1],[2]	0	[1],[3]	208	[1],[3]
Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	2	[1],[2]	2	[1],[2]	4	[1],[3]	8	[1],[3]
Recorded Investment	1,519	[1],[2]	7,968	[1],[2]	4,166	[1],[3]	15,718	[1],[3]
1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	6	[1],[2]	9	[1],[2]	7	[1],[3]	13	[1],[3]
Recorded Investment	3,317	[1],[2]	13,717	[1],[2]	5,306	[1],[3]	17,434	[1],[3]
Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	6	[1],[2]	23	[1],[2]	10	[1],[3]	27	[1],[3]
Recorded Investment	10,241	[1],[2]	15,181	[1],[2]	26,061	[1],[3]	20,672	[1],[3]
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	14	[1],[2]	34	[1],[2]	21	[1],[3]	48	[1],[3]
Recorded Investment	15,077	[1],[2]	36,866	[1],[2]	35,533	[1],[3]	53,824	[1],[3]
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	10	[1],[2]	13	[1],[2]	14	[1],[3]	15	[1],[3]
Recorded Investment	5,637	[1],[2]	16,556	[1],[2]	11,753	[1],[3]	18,293	[1],[3]
Retail [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	1	[1],[2]	7	[1],[2]	4	[1],[3]	8	[1],[3]
Recorded Investment	$ 1,009	[1],[2]	$ 2,211	[1],[2]	$ 1,573	[1],[3]	$ 2,242	[1],[3]

[1] Subsequently defaulted is defined as the earlier of the troubled debt restructuring being placed on non-accrual status or reaching 90 days past due with respect to principal and/or interest payments.

[2] For the three months ended June 30, 2011, this represents defaults on loans that were modified between the periods July 1, 2010 and June 30, 2011.

[3] For the six months ended June 30, 2011, this represents defaults on loans that were modified between the periods April 1, 2010 and June 30, 2011.