Allowance for Loan and Lease Losses (Composition of the Company's allowance for loan and lease losses) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	$ 64,859		$ 54,298
Loans And Leases Receivable Allowance, Covered	62,227	59,515	52,729	56,555	53,992	54,124
Loans And Leases Receivable Allowance Covered and Not Covered	127,086		107,027
Non Covered Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	64,859		54,298
Originated Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	50,279		49,081
Originated Loans [Member] \| Residential Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	18,872		19,937
Originated Loans [Member] \| Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	9,112		14,897
Originated Loans [Member] \| Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	8,709		6,006
Originated Loans [Member] \| Auto and Leasing Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	13,404		7,866
Originated Loans [Member] \| Unallocated Financing Receivables
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	182		375
Non-covered acquired loans accounted for under ASC 310-20
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	4,460		2,354
Non-covered acquired loans accounted for under ASC 310-20 \| Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	270		926
Non-covered acquired loans accounted for under ASC 310-20 \| Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	1,031		0
Non-covered acquired loans accounted for under ASC 310-20 \| Auto and Leasing Portfolio Segment [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	3,159		1,428
Accounted for under ASC 310-30 [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	10,120		2,863
Accounted for under ASC 310-30 [Member] \| Commercial Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	10,115		1,713
Accounted for under ASC 310-30 [Member] \| Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	5		418
Accounted for under ASC 310-30 [Member] \| Automobile Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan and lease losses, non covered	0		732
Acquired Loans In An F D I C Assisted Transaction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans And Leases Receivable Allowance, Covered	62,227		52,729
Acquired Loans In An F D I C Assisted Transaction [Member] \| Consumer Portfolio Segment
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans And Leases Receivable Allowance, Covered	389		615
Acquired Loans In An F D I C Assisted Transaction [Member] \| Loans Secured by multi-family properties [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans And Leases Receivable Allowance, Covered	15,252		12,495
Acquired Loans In An F D I C Assisted Transaction [Member] \| Commercial and Other Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans And Leases Receivable Allowance, Covered	$ 46,586		$ 39,619