Loans and Credit Quality (Details) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Carrying value of loans held for investment
Loans held for investment, net	$ 5,405,145	$ 6,046,438
Performing [Member]
Carrying value of loans held for investment
Loans held for investment, net	4,853,588	5,177,968
Performing [Member] | Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	1,057,201	1,352,039
Performing [Member] | Cash Flow [Member]
Carrying value of loans held for investment
Loans held for investment, net	1,619,384	1,558,783
Performing [Member] | Healthcare Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	252,910	269,339
Performing [Member] | Healthcare Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	480,176	841,774
Performing [Member] | Multi-Family [Member]
Carrying value of loans held for investment
Loans held for investment, net	722,564	328,300
Performing [Member] | Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	594,696	725,972
Performing [Member] | Small Business [Member]
Carrying value of loans held for investment
Loans held for investment, net	126,657	101,761
Non-Performing [Member]
Carrying value of loans held for investment
Loans held for investment, net	551,557	868,470
Non-Performing [Member] | Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	112,346	194,625
Non-Performing [Member] | Cash Flow [Member]
Carrying value of loans held for investment
Loans held for investment, net	204,656	264,786
Non-Performing [Member] | Healthcare Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	2,101	2,925
Non-Performing [Member] | Healthcare Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	27,328	28,866
Non-Performing [Member] | Multi-Family [Member]
Carrying value of loans held for investment
Loans held for investment, net	1,811	11,010
Non-Performing [Member] | Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	192,290	356,087
Non-Performing [Member] | Small Business [Member]
Carrying value of loans held for investment
Loans held for investment, net	11,025	10,171
Pass [Member]
Carrying value of loans held for investment
Loans held for investment, net	4,040,095	4,161,715
Pass [Member] | Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	856,917	1,207,990
Pass [Member] | Cash Flow [Member]
Carrying value of loans held for investment
Loans held for investment, net	1,313,942	1,110,779
Pass [Member] | Healthcare Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	216,726	245,486
Pass [Member] | Healthcare Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	417,998	773,955
Pass [Member] | Multi-Family [Member]
Carrying value of loans held for investment
Loans held for investment, net	714,939	330,017
Pass [Member] | Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	397,966	396,044
Pass [Member] | Small Business [Member]
Carrying value of loans held for investment
Loans held for investment, net	121,607	97,444
Special Mention [Member]
Carrying value of loans held for investment
Loans held for investment, net	340,874	407,663
Special Mention [Member] | Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	140,533	39,612
Special Mention [Member] | Cash Flow [Member]
Carrying value of loans held for investment
Loans held for investment, net	84,324	216,399
Special Mention [Member] | Healthcare Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	28,879	9,243
Special Mention [Member] | Healthcare Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	40,362	37,730
Special Mention [Member] | Multi-Family [Member]
Carrying value of loans held for investment
Loans held for investment, net	4,463	0
Special Mention [Member] | Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	38,395	98,401
Special Mention [Member] | Small Business [Member]
Carrying value of loans held for investment
Loans held for investment, net	3,918	6,278
Substandard [Member]
Carrying value of loans held for investment
Loans held for investment, net	794,781	1,067,339
Substandard [Member] | Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	99,366	169,986
Substandard [Member] | Cash Flow [Member]
Carrying value of loans held for investment
Loans held for investment, net	382,544	350,287
Substandard [Member] | Healthcare Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	8,391	15,509
Substandard [Member] | Healthcare Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	44,978	47,090
Substandard [Member] | Multi-Family [Member]
Carrying value of loans held for investment
Loans held for investment, net	3,162	8,919
Substandard [Member] | Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	248,843	470,034
Substandard [Member] | Small Business [Member]
Carrying value of loans held for investment
Loans held for investment, net	7,497	5,514
Doubtful [Member]
Carrying value of loans held for investment
Loans held for investment, net	229,395	409,721
Doubtful [Member] | Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	72,731	129,076
Doubtful [Member] | Cash Flow [Member]
Carrying value of loans held for investment
Loans held for investment, net	43,230	146,104
Doubtful [Member] | Healthcare Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	1,015	2,026
Doubtful [Member] | Healthcare Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	4,166	11,865
Doubtful [Member] | Multi-Family [Member]
Carrying value of loans held for investment
Loans held for investment, net	1,811	374
Doubtful [Member] | Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	101,782	117,580
Doubtful [Member] | Small Business [Member]
Carrying value of loans held for investment
Loans held for investment, net	4,660	2,696
Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	1,169,547	1,546,664
Cash Flow [Member]
Carrying value of loans held for investment
Loans held for investment, net	1,824,040	1,823,569
Healthcare Asset-Based [Member]
Carrying value of loans held for investment
Loans held for investment, net	255,011	272,264
Healthcare Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	507,504	870,640
Multi-Family [Member]
Carrying value of loans held for investment
Loans held for investment, net	724,375	339,310
Real Estate [Member]
Carrying value of loans held for investment
Loans held for investment, net	786,986	1,082,059
Small Business [Member]
Carrying value of loans held for investment
Loans held for investment, net	$ 137,682	$ 111,932