Loans Receivable and Allowance for Loan and Lease Losses (Details 5) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Credit quality tables for the non-covered loan portfolio
Total loans receivable	$ 1,650,877	$ 1,342,930
Commercial and Industrial [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	72,140	69,736
Commercial and Industrial [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	12,324	13,084
Commercial Real Estate [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	458,377	352,077
Commercial Real Estate [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	45,893	48,789
Construction [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	12,986	15,271
Construction [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	30,859	37,926
Residential Real Estate [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	91,539	53,476
Residential Real Estate [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	20,205	22,465
Consumer [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	2,402	2,211
Mortgage Warehouse [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	801,994	619,318
Manufactured Housing [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	98,146	104,565
Manufactured Housing [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	4,012	4,012
Pass/Satisfactory [Member] | Commercial and Industrial [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	68,996	61,851
Pass/Satisfactory [Member] | Commercial and Industrial [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	9,942	10,928
Pass/Satisfactory [Member] | Commercial Real Estate [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	423,925	307,734
Pass/Satisfactory [Member] | Commercial Real Estate [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	29,425	29,892
Pass/Satisfactory [Member] | Construction [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	8,718	9,314
Pass/Satisfactory [Member] | Construction [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	2,953	5,539
Pass/Satisfactory [Member] | Residential Real Estate [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	88,988	50,517
Pass/Satisfactory [Member] | Residential Real Estate [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	14,887	16,476
Special Mention [Member] | Commercial and Industrial [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	2,026	57
Special Mention [Member] | Commercial and Industrial [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	1,744	1,778
Special Mention [Member] | Commercial Real Estate [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	11,654	13,402
Special Mention [Member] | Commercial Real Estate [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	222	1,633
Special Mention [Member] | Construction [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	587	237
Special Mention [Member] | Construction [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	4,057	7,641
Special Mention [Member] | Residential Real Estate [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	247	0
Special Mention [Member] | Residential Real Estate [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	2,567	455
Substandard [Member] | Commercial and Industrial [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	821	7,506
Substandard [Member] | Commercial and Industrial [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	638	378
Substandard [Member] | Commercial Real Estate [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	21,281	29,278
Substandard [Member] | Commercial Real Estate [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	16,246	17,264
Substandard [Member] | Construction [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	2,611	4,349
Substandard [Member] | Construction [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	23,849	24,746
Substandard [Member] | Residential Real Estate [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	2,304	2,959
Substandard [Member] | Residential Real Estate [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	2,751	5,534
Doubtful [Member] | Commercial and Industrial [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	297	322
Doubtful [Member] | Commercial and Industrial [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	0	0
Doubtful [Member] | Commercial Real Estate [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	1,517	1,663
Doubtful [Member] | Commercial Real Estate [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	0	0
Doubtful [Member] | Construction [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	1,070	1,371
Doubtful [Member] | Construction [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	0	0
Doubtful [Member] | Residential Real Estate [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	0	0
Doubtful [Member] | Residential Real Estate [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	0	0
Performing [Member] | Consumer [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	2,339	2,171
Performing [Member] | Mortgage Warehouse [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	801,994	619,318
Performing [Member] | Manufactured Housing [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	98,146	104,565
Performing [Member] | Manufactured Housing [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	3,834	3,857
Nonperforming [Member] | Consumer [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	63	40
Nonperforming [Member] | Mortgage Warehouse [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	0	0
Nonperforming [Member] | Manufactured Housing [Member] | Non-covered loans [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	0	0
Nonperforming [Member] | Manufactured Housing [Member] | Covered loan [Member]
Credit quality tables for the non-covered loan portfolio
Total loans receivable	$ 178	$ 155