Loans Receivable (Investment in loans on non-accrual status) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 99,714	$ 104,090
Originated Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	96,910	101,295
Originated Loan [Member] | Traditional loan
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	34,527	45,256
Originated Loan [Member] | Originated Up To The Year 2002 [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	3,070	3,336
Originated Loan [Member] | Originated In The Years 2003 And 2004 [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	6,380	7,668
Originated Loan [Member] | Originated In The Year 2005 [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	3,280	4,487
Originated Loan [Member] | Originated In The Year 2006 [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	5,905	6,746
Originated Loan [Member] | Originated In The Years 2007 2008 And 2009 [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	7,984	11,526
Originated Loan [Member] | Originated In The Years 2010 2011 2012 2013 [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	6,259	10,089
Originated Loan [Member] | Originated In Years 2014, 2015, 2016 and 2017 [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,649	1,404
Originated Loan [Member] | NonTraditional Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	3,543	4,730
Originated Loan [Member] | Loss Mitigation Program [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	16,783	20,744
Originated Loan [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	35,253	19,532
Originated Loan [Member] | Commercial Secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	25,950	16,243
Originated Loan [Member] | Institutional Commercial Secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	118	0
Originated Loan [Member] | Retail Commercial Secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	14,438	11,561
Originated Loan [Member] | Middle Market Commercial Secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	11,394	4,682
Originated Loan [Member] | Other Commercial and Industrial[Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	9,303	3,289
Originated Loan [Member] | Middle Market Other Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	6,323	1,278
Originated Loan [Member] | Retail Other Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	2,929	1,950
Originated Loan [Member] | Floor Plan Other Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	51	61
Originated Loan [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	2,572	1,981
Originated Loan [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,227	525
Originated Loan [Member] | Overdrafts [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	31	0
Originated Loan [Member] | Unsecured personal lines of credit [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	102	32
Originated Loan [Member] | Unsecured personal loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	900	1,420
Originated Loan [Member] | Cash collateral personal loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	312	4
Originated Loan [Member] | Auto and Leasing [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	4,232	9,052
Acquired loans accounted for under ASC 310-20 [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	2,804	2,795
Acquired loans accounted for under ASC 310-20 [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,270	1,415
Acquired loans accounted for under ASC 310-20 [Member] | Commercial Secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,047	1,292
Acquired loans accounted for under ASC 310-20 [Member] | Floor Plan Commercial Secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	928	1,149
Acquired loans accounted for under ASC 310-20 [Member] | Retail Commercial Secured [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	119	143
Acquired loans accounted for under ASC 310-20 [Member] | Other Commercial and Industrial[Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	223	123
Acquired loans accounted for under ASC 310-20 [Member] | Retail Other Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	221	121
Acquired loans accounted for under ASC 310-20 [Member] | Floor Plan Other Commercial [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	2	2
Acquired loans accounted for under ASC 310-20 [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,355	828
Acquired loans accounted for under ASC 310-20 [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,310	708
Acquired loans accounted for under ASC 310-20 [Member] | Unsecured personal loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	45	120
Acquired loans accounted for under ASC 310-20 [Member] | Auto Loan [Member]
Financing Receivable, Recorded Investment [Line Items]
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 179	$ 552