Loans and Allowance for Loan Losses (Troubled Debt Restructurings) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014 Contract		Sep. 30, 2013 Contract		Sep. 30, 2014 Contract		Sep. 30, 2013 Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts	61		149		188		485
Recorded Investment	$ 21,757	[1]	$ 216,194	[2]	$ 96,417	[3]	$ 382,596	[4]
Net charge-offs	163		146		163		199
Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	5		0		11		1
Recorded Investment	435		0		1,614		80
Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	5		39		13		123
Recorded Investment	755		4,072		2,611		14,234
Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	0		0		0		0
Recorded Investment	0		0		0		0
Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	7		18		17		56
Recorded Investment	251		815		928		2,303
Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	4		13		14		44
Recorded Investment	4,774		74,111		14,021		125,635
1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	7		41		36		99
Recorded Investment	1,082		6,965		6,249		37,916
Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	3		10		15		26
Recorded Investment	3,188		110,827		9,747		123,464
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	14		64		65		169
Recorded Investment	9,044		191,903		30,017		287,015
Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	28		16		68		85
Recorded Investment	8,438		5,889		24,676		34,458
Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	2		12		14		51
Recorded Investment	2,833		13,515		36,570		44,506
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	30		28		82		136
Recorded Investment	11,272		19,404		61,247		78,964
Retail [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts	17		57		41		180
Recorded Investment	1,441		4,887		5,153		16,617
Principal Forgiveness [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	2,398				2,398		681
Principal Forgiveness [Member] | Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0		0		0		0
Principal Forgiveness [Member] | Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0		0		0		0
Principal Forgiveness [Member] | Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0		0		0		0
Principal Forgiveness [Member] | Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0		0		0		0
Principal Forgiveness [Member] | Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0		0		0		0
Principal Forgiveness [Member] | 1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0		0		0		424
Principal Forgiveness [Member] | Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	2,338		0		2,338		74
Principal Forgiveness [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	2,338		0		2,338		498
Principal Forgiveness [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	60		0		60		183
Principal Forgiveness [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0		0		0		0
Principal Forgiveness [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	60		0		60		183
Principal Forgiveness [Member] | Retail [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0		0		0		0
Below Market Interest Rate [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	8,839		199,490		49,354		318,033
Below Market Interest Rate [Member] | Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	435		0		1,163		0
Below Market Interest Rate [Member] | Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	543		3,106		2,296		10,230
Below Market Interest Rate [Member] | Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0		0		0		0
Below Market Interest Rate [Member] | Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	101		419		543		879
Below Market Interest Rate [Member] | Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	875		74,111		8,423		121,263
Below Market Interest Rate [Member] | 1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	879		4,832		2,390		28,863
Below Market Interest Rate [Member] | Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	204		108,295		4,721		113,627
Below Market Interest Rate [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	1,958		187,238		15,534		263,753
Below Market Interest Rate [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	3,098		3,152		7,639		21,600
Below Market Interest Rate [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	2,703		5,575		22,178		21,571
Below Market Interest Rate [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	5,802		8,727		29,818		43,171
Below Market Interest Rate [Member] | Retail [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	1,079		3,525		4,002		11,109
Term Extensions and or Other Concessions [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	10,520		16,704		44,665		63,882
Term Extensions and or Other Concessions [Member] | Home Equity Lines [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	0		0		451		80
Term Extensions and or Other Concessions [Member] | Consumer Mortgages [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	212		966		315		4,004
Term Extensions and or Other Concessions [Member] | Credit Cards [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment			0		0		0
Term Extensions and or Other Concessions [Member] | Other Retail Loans [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	150		396		385		1,424
Term Extensions and or Other Concessions [Member] | Investment Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	3,899		0		5,598		4,372
Term Extensions and or Other Concessions [Member] | 1-4 Family Properties [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	203		2,133		3,859		8,629
Term Extensions and or Other Concessions [Member] | Land Acquisition [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	646		2,532		2,688		9,763
Term Extensions and or Other Concessions [Member] | Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	4,748		4,665		12,145		22,764
Term Extensions and or Other Concessions [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	5,280		2,737		16,977		12,675
Term Extensions and or Other Concessions [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	130		7,940		14,392		22,935
Term Extensions and or Other Concessions [Member] | Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	5,410		10,677		31,369		35,610
Term Extensions and or Other Concessions [Member] | Retail [Member]
Financing Receivable, Modifications [Line Items]
Recorded Investment	$ 362		$ 1,362		$ 1,151		$ 5,508

[1] Net charge-offs of $163 thousand were recorded during the three months ended September 30, 2014 upon restructuring of these loans.

[2] Net charge-offs of $146 thousand were recorded during the three months ended September 30, 2013 upon restructuring of these loans.

[3] Net charge-offs of $163 thousand were recorded during the nine months ended September 30, 2014 upon restructuring of these loans.

[4] Net charge-offs of $199 thousand were recorded during the nine months ended September 30, 2013 upon restructuring of these loans.