Segment Information (Summary Of Certain Operating Information For Reportable Segments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Total net interest income	$ 108,706	$ 104,314	$ 218,320	$ 200,179
Total non-interest income	36,652	50,436	77,539	93,044
Total net revenue	145,358	154,750	295,859	293,223
Total segment profit	11,750	13,009	28,152	29,027
Total segment assets	14,615,897	13,708,560	14,615,897	13,708,560	13,980,156
Change in Contribution, Total net interest income	4,392		18,141
Change in Contribution, Total non-interest income	(13,784)		(15,505)
Change in Contribution, Total net revenue	(9,392)		2,636
Change in Contribution, Total segment profit	(1,259)		(875)
Change in Contribution, Total segment assets	907,337		907,337
Change in Contribution, Total net interest income	4.00%		9.00%
Change in Contribution, Total non-interest income	(27.00%)		(17.00%)
Change in Contribution, Total net revenue	(6.00%)		1.00%
Change in Contribution, Total segment profit	(10.00%)		(3.00%)
Change in Contribution, Total segment assets	7.00%
Community Banking [Member]
Total net interest income	101,580	97,437	202,811	185,461
Total non-interest income	24,967	41,618	53,458	56,814
Total net revenue	126,547	139,055	256,269	242,275
Total segment profit	10,630	24,604	28,271	30,627
Total segment assets	13,768,237	12,875,801	13,768,237	12,875,801
Change in Contribution, Total net interest income	4,143		17,350
Change in Contribution, Total non-interest income	(16,651)		(3,356)
Change in Contribution, Total net revenue	(12,508)		13,994
Change in Contribution, Total segment profit	(13,974)		(2,356)
Change in Contribution, Total segment assets	892,436		892,436
Change in Contribution, Total net interest income	4.00%		9.00%
Change in Contribution, Total non-interest income	(40.00%)		(6.00%)
Change in Contribution, Total net revenue	(9.00%)		6.00%
Change in Contribution, Total segment profit	(57.00%)		(8.00%)
Change in Contribution, Total segment assets	7.00%
Specialty Finance [Member]
Total net interest income	27,974	22,378	56,006	45,411
Total non-interest income	781	707	1,498	12,183
Total net revenue	28,755	23,085	57,504	57,594
Total segment profit	15,413	(493)	27,965	15,414
Total segment assets	3,211,599	2,886,020	3,211,599	2,886,020
Change in Contribution, Total net interest income	5,596		10,595
Change in Contribution, Total non-interest income	74		(10,685)
Change in Contribution, Total net revenue	5,670		(90)
Change in Contribution, Total segment profit	15,906		12,551
Change in Contribution, Total segment assets	325,579		325,579
Change in Contribution, Total net interest income	25.00%		23.00%
Change in Contribution, Total non-interest income	10.00%		(88.00%)
Change in Contribution, Total net revenue	25.00%
Change in Contribution, Total segment profit	0.00%		81.00%
Change in Contribution, Total segment assets	11.00%
Wealth Management [Member]
Total net interest income	886	2,437	3,439	4,979
Total non-interest income	13,432	11,069	26,430	21,757
Total net revenue	14,318	13,506	29,869	26,736
Total segment profit	980	1,316	2,703	2,373
Total segment assets	67,262	66,123	67,262	66,123
Change in Contribution, Total net interest income	(1,551)		(1,540)
Change in Contribution, Total non-interest income	2,363		4,673
Change in Contribution, Total net revenue	812		3,133
Change in Contribution, Total segment profit	(336)		330
Change in Contribution, Total segment assets	1,139		1,139
Change in Contribution, Total net interest income	(64.00%)		(31.00%)
Change in Contribution, Total non-interest income	21.00%		21.00%
Change in Contribution, Total net revenue	6.00%		12.00%
Change in Contribution, Total segment profit	(26.00%)		14.00%
Change in Contribution, Total segment assets	2.00%
Parent And Inter-Segment Eliminations [Member]
Total net interest income	(21,734)	(17,938)	(43,936)	(35,672)
Total non-interest income	(2,528)	(2,958)	(3,847)	2,290
Total net revenue	(24,262)	(20,896)	(47,783)	(33,382)
Total segment profit	(15,273)	(12,418)	(30,787)	(19,387)
Total segment assets	(2,431,201)	(2,119,384)	(2,431,201)	(2,119,384)
Change in Contribution, Total net interest income	(3,796)		(8,264)
Change in Contribution, Total non-interest income	430		(6,137)
Change in Contribution, Total net revenue	(3,366)		(14,401)
Change in Contribution, Total segment profit	(2,855)		(11,400)
Change in Contribution, Total segment assets	$ (311,817)		$ (311,817)
Change in Contribution, Total net interest income	(21.00%)		(23.00%)
Change in Contribution, Total non-interest income	15.00%		0.00%
Change in Contribution, Total net revenue	(16.00%)		(43.00%)
Change in Contribution, Total segment profit	(23.00%)		(59.00%)
Change in Contribution, Total segment assets	(15.00%)