Loans and Allowance for Loan Losses (Schedule Of Impaired Loans) (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	$ 47,598,000		$ 47,598,000		$ 65,256,000
Recorded Investment, With allowance recorded	299,136,000		299,136,000		376,892,000
Recorded Investment					442,148,000
Unpaid Principal Balance, With no related allowance recorded	103,236,000		103,236,000		125,470,000
Unpaid Principal Balance, With allowance recorded	300,626,000		300,626,000		380,036,000
Unpaid Principal Balance	403,862,000		403,862,000		505,506,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	28,581,000		28,581,000		33,476,000
Related Allowance	28,581,000		28,581,000		33,476,000
Average Recorded Investment, With no related allowance recorded	56,614,000		59,914,000		90,590,000
Average Recorded Investment, With allowance recorded	318,923,000		341,550,000		531,456,000
Average Recorded Investment	375,537,000	$ 650,700,000	401,464,000	$ 720,400,000	622,046,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	2,506,000		5,142,000		14,861,000
Interest Income Recognized	2,506,000		5,142,000	$ 0	14,861,000
Home Equity Lines [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	352,000		352,000		0
Recorded Investment, With allowance recorded	8,921,000		8,921,000		4,848,000
Recorded Investment	9,273,000		9,273,000		4,848,000
Unpaid Principal Balance, With no related allowance recorded	384,000		384,000		0
Unpaid Principal Balance, With allowance recorded	8,921,000		8,921,000		4,848,000
Unpaid Principal Balance	9,305,000		9,305,000		4,848,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	185,000		185,000		129,000
Related Allowance	185,000		185,000		129,000
Average Recorded Investment, With no related allowance recorded	117,000		59,000		0
Average Recorded Investment, With allowance recorded	8,404,000		7,034,000		3,604,000
Average Recorded Investment	8,521,000		7,093,000		3,604,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	64,000		123,000		1,405,000
Interest Income Recognized	64,000		123,000		1,405,000
Consumer Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,415,000		1,415,000		995,000
Recorded Investment, With allowance recorded	25,105,000		25,105,000		33,450,000
Recorded Investment	26,520,000		26,520,000		34,445,000
Unpaid Principal Balance, With no related allowance recorded	2,694,000		2,694,000		2,065,000
Unpaid Principal Balance, With allowance recorded	25,105,000		25,105,000		33,450,000
Unpaid Principal Balance	27,799,000		27,799,000		35,515,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	833,000		833,000		1,040,000
Related Allowance	833,000		833,000		1,040,000
Average Recorded Investment, With no related allowance recorded	1,135,000		1,065,000		1,352,000
Average Recorded Investment, With allowance recorded	26,622,000		28,960,000		39,427,000
Average Recorded Investment	27,757,000		30,025,000		40,779,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	316,000		661,000		115,000
Interest Income Recognized	316,000		661,000		115,000
Credit Card Receivable [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0		0		0
Recorded Investment, With allowance recorded	0		0		0
Recorded Investment	0		0		0
Unpaid Principal Balance, With no related allowance recorded	0		0		0
Unpaid Principal Balance, With allowance recorded	0		0		0
Unpaid Principal Balance	0		0		0
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	0		0		0
Related Allowance	0		0		0
Average Recorded Investment, With no related allowance recorded	0		0		0
Average Recorded Investment, With allowance recorded	0		0		0
Average Recorded Investment	0		0		0
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	0		0		0
Interest Income Recognized	0		0		0
Other Retail Loans [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	0		0		0
Recorded Investment, With allowance recorded	5,220,000		5,220,000		5,293,000
Recorded Investment	5,220,000		5,220,000		5,293,000
Unpaid Principal Balance, With no related allowance recorded	0		0		0
Unpaid Principal Balance, With allowance recorded	5,220,000		5,220,000		5,293,000
Unpaid Principal Balance	5,220,000		5,220,000		5,293,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	74,000		74,000		101,000
Related Allowance	74,000		74,000		101,000
Average Recorded Investment, With no related allowance recorded	0		0		0
Average Recorded Investment, With allowance recorded	5,323,000		5,287,000		4,997,000
Average Recorded Investment	5,323,000		5,287,000		4,997,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	82,000		166,000		315,000
Interest Income Recognized	82,000		166,000		315,000
Investment Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	10,143,000		10,143,000		15,368,000
Recorded Investment, With allowance recorded	73,222,000		73,222,000		81,758,000
Recorded Investment	83,365,000		83,365,000		97,126,000
Unpaid Principal Balance, With no related allowance recorded	12,858,000		12,858,000		20,237,000
Unpaid Principal Balance, With allowance recorded	73,222,000		73,222,000		83,963,000
Unpaid Principal Balance	86,080,000		86,080,000		104,200,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	7,633,000		7,633,000		5,413,000
Related Allowance	7,633,000		7,633,000		5,413,000
Average Recorded Investment, With no related allowance recorded	13,595,000		14,279,000		25,311,000
Average Recorded Investment, With allowance recorded	79,258,000		82,837,000		129,289,000
Average Recorded Investment	92,853,000		97,116,000		154,600,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	616,000		1,247,000		3,690,000
Interest Income Recognized	616,000		1,247,000		3,690,000
1-4 Family Properties [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	2,146,000		2,146,000		2,981,000
Recorded Investment, With allowance recorded	59,985,000		59,985,000		80,625,000
Recorded Investment	62,131,000		62,131,000		83,606,000
Unpaid Principal Balance, With no related allowance recorded	7,754,000		7,754,000		10,520,000
Unpaid Principal Balance, With allowance recorded	60,797,000		60,797,000		81,357,000
Unpaid Principal Balance	68,551,000		68,551,000		91,877,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	6,312,000		6,312,000		11,442,000
Related Allowance	6,312,000		6,312,000		11,442,000
Average Recorded Investment, With no related allowance recorded	2,482,000		2,685,000		5,441,000
Average Recorded Investment, With allowance recorded	61,177,000		66,855,000		94,773,000
Average Recorded Investment	63,659,000		69,540,000		100,214,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	451,000		807,000		2,645,000
Interest Income Recognized	451,000		807,000		2,645,000
Land Acquisition [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	12,076,000		12,076,000		21,504,000
Recorded Investment, With allowance recorded	35,658,000		35,658,000		49,300,000
Recorded Investment	47,734,000		47,734,000		70,804,000
Unpaid Principal Balance, With no related allowance recorded	51,816,000		51,816,000		61,843,000
Unpaid Principal Balance, With allowance recorded	36,256,000		36,256,000		49,483,000
Unpaid Principal Balance	88,072,000		88,072,000		111,326,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	3,252,000		3,252,000		4,900,000
Related Allowance	3,252,000		3,252,000		4,900,000
Average Recorded Investment, With no related allowance recorded	16,285,000		18,550,000		29,954,000
Average Recorded Investment, With allowance recorded	40,675,000		42,584,000		89,195,000
Average Recorded Investment	56,960,000		61,134,000		119,149,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	265,000		548,000		1,689,000
Interest Income Recognized	265,000		548,000		1,689,000
Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	24,365,000		24,365,000		39,853,000
Recorded Investment, With allowance recorded	168,865,000		168,865,000		211,683,000
Recorded Investment	193,230,000		193,230,000		251,536,000
Unpaid Principal Balance, With no related allowance recorded	72,428,000		72,428,000		92,600,000
Unpaid Principal Balance, With allowance recorded	170,275,000		170,275,000		214,803,000
Unpaid Principal Balance	242,703,000		242,703,000		307,403,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	17,197,000		17,197,000		21,755,000
Related Allowance	17,197,000		17,197,000		21,755,000
Average Recorded Investment, With no related allowance recorded	32,362,000		35,514,000		60,706,000
Average Recorded Investment, With allowance recorded	181,110,000		192,276,000		313,257,000
Average Recorded Investment	213,472,000		227,790,000		373,963,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	1,332,000		2,602,000		8,024,000
Interest Income Recognized	1,332,000		2,602,000		8,024,000
Commercial, Financial and Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	3,811,000		3,811,000		7,391,000
Recorded Investment, With allowance recorded	39,277,000		39,277,000		59,035,000
Recorded Investment	43,088,000		43,088,000		66,426,000
Unpaid Principal Balance, With no related allowance recorded	6,981,000		6,981,000		11,193,000
Unpaid Principal Balance, With allowance recorded	39,360,000		39,360,000		59,041,000
Unpaid Principal Balance	46,341,000		46,341,000		70,234,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	8,068,000		8,068,000		7,597,000
Related Allowance	8,068,000		8,068,000		7,597,000
Average Recorded Investment, With no related allowance recorded	4,694,000		5,344,000		8,984,000
Average Recorded Investment, With allowance recorded	40,585,000		47,618,000		91,221,000
Average Recorded Investment	45,279,000		52,962,000		100,205,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	268,000		637,000		2,392,000
Interest Income Recognized	268,000		637,000		2,392,000
Owner-Occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	17,655,000		17,655,000		17,017,000
Recorded Investment, With allowance recorded	51,748,000		51,748,000		62,583,000
Recorded Investment	69,403,000		69,403,000		79,600,000
Unpaid Principal Balance, With no related allowance recorded	20,749,000		20,749,000		19,612,000
Unpaid Principal Balance, With allowance recorded	51,745,000		51,745,000		62,601,000
Unpaid Principal Balance	72,494,000		72,494,000		82,213,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	2,224,000		2,224,000		2,854,000
Related Allowance	2,224,000		2,224,000		2,854,000
Average Recorded Investment, With no related allowance recorded	18,306,000		17,932,000		19,548,000
Average Recorded Investment, With allowance recorded	56,879,000		60,375,000		78,950,000
Average Recorded Investment	75,185,000		78,307,000		98,498,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	443,000		953,000		2,610,000
Interest Income Recognized	443,000		953,000		2,610,000
Commercial and Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	21,466,000		21,466,000		24,408,000
Recorded Investment, With allowance recorded	91,025,000		91,025,000		121,618,000
Recorded Investment	112,491,000		112,491,000		146,026,000
Unpaid Principal Balance, With no related allowance recorded	27,730,000		27,730,000		30,805,000
Unpaid Principal Balance, With allowance recorded	91,105,000		91,105,000		121,642,000
Unpaid Principal Balance	118,835,000		118,835,000		152,447,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	10,292,000		10,292,000		10,451,000
Related Allowance					10,451,000
Average Recorded Investment, With no related allowance recorded	23,000,000		23,276,000		28,532,000
Average Recorded Investment, With allowance recorded	97,464,000		107,993,000		170,171,000
Average Recorded Investment	120,464,000		131,269,000		198,703,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	712,000		1,590,000		5,002,000
Interest Income Recognized	712,000		1,590,000		5,002,000
Retail [Member]
Financing Receivable, Impaired [Line Items]
Recorded Investment, With no related allowance recorded	1,767,000		1,767,000		995,000
Recorded Investment, With allowance recorded	39,246,000		39,246,000		43,591,000
Recorded Investment	41,013,000		41,013,000		44,586,000
Unpaid Principal Balance, With no related allowance recorded	3,078,000		3,078,000		2,065,000
Unpaid Principal Balance, With allowance recorded	39,246,000		39,246,000		43,591,000
Unpaid Principal Balance	42,324,000		42,324,000		45,656,000
Related Allowance, With no related allowance recorded	0		0		0
Related Allowance, With allowance recorded	1,092,000		1,092,000		1,270,000
Related Allowance	1,092,000		1,092,000		1,270,000
Average Recorded Investment, With no related allowance recorded	1,252,000		1,124,000		1,352,000
Average Recorded Investment, With allowance recorded	40,349,000		41,281,000		48,028,000
Average Recorded Investment	41,601,000		42,405,000		49,380,000
Interest Income Recognized, With no related allowance recorded	0		0		0
Interest Income Recognized, With allowance recorded	462,000		950,000		1,835,000
Interest Income Recognized	$ 462,000		$ 950,000		$ 1,835,000