Allowance for Loan and Lease Losses (Allowance for loan and lease losses) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Provision for Non Covered Loan and Lease Losses	$ 54,960	$ 67,559	$ 13,854
Non-covered acquired loans accounted under ASC 310-20
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	2,354	0
Charge-offs	(13,445)	(11,205)
Recoveries	2,773	4,442
Provision for Non Covered Loan and Lease Losses	12,915	9,117
Balance at end of period	4,597	2,354
Most recent acquired loans accounted under ASC 310-30
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	2,863	0
Provision for Non Covered Loan and Lease Losses	10,618	2,863
Balance at end of period	13,481	2,863
Non-covered originated loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	49,081	39,921	37,010
Charge-offs	(39,258)	(48,541)	(11,451)
Recoveries	10,189	2,122	508
Provision for Non Covered Loan and Lease Losses	31,427	55,579	13,854
Balance at end of period	51,439	49,081	39,921
Residential Portfolio Segment \| Most recent acquired loans accounted under ASC 310-30
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	0	0
Provision for Non Covered Loan and Lease Losses	0	0
Balance at end of period	0	0
Residential Portfolio Segment \| Non-covered originated loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	19,937	21,092	21,652
Charge-offs	(5,011)	(36,566)	(6,492)
Recoveries	428	6	131
Provision for Non Covered Loan and Lease Losses	4,325	35,405	5,801
Balance at end of period	19,679	19,937	21,092
Commercial Portfolio Segment \| Non-covered acquired loans accounted under ASC 310-20
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	926	0
Charge-offs	(532)	(25)
Recoveries	73	9
Provision for Non Covered Loan and Lease Losses	(402)	942
Balance at end of period	65	926
Commercial Portfolio Segment \| Most recent acquired loans accounted under ASC 310-30
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	1,713	0
Provision for Non Covered Loan and Lease Losses	11,763	1,713
Balance at end of period	13,476	1,713
Commercial Portfolio Segment \| Non-covered originated loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	14,897	17,072	12,548
Charge-offs	(2,424)	(5,889)	(4,081)
Recoveries	333	383	156
Provision for Non Covered Loan and Lease Losses	(4,374)	3,331	8,449
Balance at end of period	8,432	14,897	17,072
Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at end of period		0
Consumer Portfolio Segment \| Non-covered acquired loans accounted under ASC 310-20
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	0	0
Charge-offs	(6,902)	(5,530)
Recoveries	531	1,035
Provision for Non Covered Loan and Lease Losses	7,582	4,495
Balance at end of period	1,211	0
Consumer Portfolio Segment \| Most recent acquired loans accounted under ASC 310-30
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	418	0
Provision for Non Covered Loan and Lease Losses	(413)	418
Balance at end of period	5	418
Consumer Portfolio Segment \| Non-covered originated loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	6,006	856	1,423
Charge-offs	(5,782)	(1,485)	(739)
Recoveries	570	165	194
Provision for Non Covered Loan and Lease Losses	8,278	6,470	(22)
Balance at end of period	9,072	6,006	856
Auto Portfolio Segment \| Non-covered acquired loans accounted under ASC 310-20
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	1,428	0
Charge-offs	(6,011)	(5,650)
Recoveries	2,169	3,398
Provision for Non Covered Loan and Lease Losses	5,735	3,680
Balance at end of period	3,321	1,428
Auto Portfolio Segment \| Most recent acquired loans accounted under ASC 310-30
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	732	0
Provision for Non Covered Loan and Lease Losses	(732)	732
Balance at end of period	0	732
Auto and Leasing Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at end of period		7,866
Auto and Leasing Portfolio Segment \| Non-covered originated loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	7,866	533	845
Charge-offs	(26,041)	(4,601)	(139)
Recoveries	8,858	1,568	27
Provision for Non Covered Loan and Lease Losses	23,572	10,366	(200)
Balance at end of period	14,255	7,866	533
Unallocated Financing Receivables
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at end of period		0
Unallocated Financing Receivables \| Non-covered acquired loans accounted under ASC 310-20
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	0	0
Charge-offs	0	0
Recoveries	0	0
Provision for Non Covered Loan and Lease Losses	0	0
Balance at end of period	0	0
Unallocated Financing Receivables \| Non-covered originated loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	375	368	542
Charge-offs	0	0	0
Recoveries	0	0	0
Provision for Non Covered Loan and Lease Losses	(374)	7	(174)
Balance at end of period	1	375	368
Construction Portfolio Segment \| Most recent acquired loans accounted under ASC 310-30
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance at beginning of period	0	0
Provision for Non Covered Loan and Lease Losses	0	0
Balance at end of period	$ 0	$ 0

Allowance for Loan and Lease Losses (Allowance for loan and lease losses) (Details) (USD $)
In Thousands, unless otherwise specified

12 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Financing Receivable, Allowance for Credit Losses [Roll Forward]

Provision for Non Covered Loan and Lease Losses

$ 54,960

$ 67,559

$ 13,854

Non-covered acquired loans accounted under ASC 310-20

Financing Receivable, Allowance for Credit Losses [Roll Forward]