Loans Receivable (Risk category of gross loans not subject to risk rating ) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	$ 4,188,441	$ 4,245,364
Financing Receivable, Individually Evaluated for Impairment	59,618	54,289
Loans, Not Subject To Risk Ratings [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,870,405	1,854,292
0 - 29 Days Past Due	1,628,501	1,603,197
30 - 59 Days Past Due	56,714	52,977
60 - 89 Days Past Due	31,891	37,908
90-119 Days Past Due	13,871	17,143
120 - 364 Days Past Due	21,650	20,406
365+ Days Past Due	28,958	31,011
Financing Receivable, Individually Evaluated for Impairment	88,820	91,650
Originated loans, not subject to risk rating [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	1,796,881	1,768,404
0 - 29 Days Past Due	1,560,643	1,524,826
30 - 59 Days Past Due	53,279	48,541
60 - 89 Days Past Due	30,690	36,170
90-119 Days Past Due	13,291	16,480
120 - 364 Days Past Due	21,201	19,726
365+ Days Past Due	28,957	31,011
Financing Receivable, Individually Evaluated for Impairment	88,820	91,650
Originated loans, not subject to risk rating [Member] \| Mortgage Loan [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	709,863	721,494
0 - 29 Days Past Due	550,630	554,572
30 - 59 Days Past Due	1,708	2,529
60 - 89 Days Past Due	14,325	15,348
90-119 Days Past Due	6,521	8,954
120 - 364 Days Past Due	18,927	17,434
365+ Days Past Due	28,932	31,007
Financing Receivable, Individually Evaluated for Impairment	88,820	91,650
Originated loans, not subject to risk rating [Member] \| Conventional Loan [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	575,311	585,089
0 - 29 Days Past Due	515,852	518,791
30 - 59 Days Past Due	90	225
60 - 89 Days Past Due	12,374	13,169
90-119 Days Past Due	3,237	5,759
120 - 364 Days Past Due	12,546	11,431
365+ Days Past Due	18,321	20,047
Financing Receivable, Individually Evaluated for Impairment	12,891	15,667
Originated loans, not subject to risk rating [Member] \| Originated Up To The Year 2002 [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	48,795	50,285
0 - 29 Days Past Due	43,628	44,248
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	1,407	2,095
90-119 Days Past Due	477	368
120 - 364 Days Past Due	1,188	1,315
365+ Days Past Due	1,334	1,552
Financing Receivable, Individually Evaluated for Impairment	761	707
Originated loans, not subject to risk rating [Member] \| Originated In The Years 2003 And 2004 [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	88,452	90,707
0 - 29 Days Past Due	76,647	78,501
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	3,834	3,712
90-119 Days Past Due	861	1,767
120 - 364 Days Past Due	3,128	2,675
365+ Days Past Due	2,295	2,100
Financing Receivable, Individually Evaluated for Impairment	1,687	1,952
Originated loans, not subject to risk rating [Member] \| Originated In The Year 2005 [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	47,908	50,009
0 - 29 Days Past Due	42,078	43,177
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	1,643	1,952
90-119 Days Past Due	580	561
120 - 364 Days Past Due	1,009	1,024
365+ Days Past Due	1,560	2,181
Financing Receivable, Individually Evaluated for Impairment	1,038	1,114
Originated loans, not subject to risk rating [Member] \| Originated In The Year 2006 [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	66,969	69,300
0 - 29 Days Past Due	56,976	57,271
30 - 59 Days Past Due	0	82
60 - 89 Days Past Due	2,094	2,397
90-119 Days Past Due	162	353
120 - 364 Days Past Due	2,122	2,210
365+ Days Past Due	3,139	3,410
Financing Receivable, Individually Evaluated for Impairment	2,476	3,577
Originated loans, not subject to risk rating [Member] \| Originated In The Years 2007 2008 And 2009 [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	74,705	76,729
0 - 29 Days Past Due	60,651	61,547
30 - 59 Days Past Due	0	83
60 - 89 Days Past Due	1,681	1,439
90-119 Days Past Due	568	865
120 - 364 Days Past Due	2,464	2,330
365+ Days Past Due	6,015	6,459
Financing Receivable, Individually Evaluated for Impairment	3,326	4,006
Originated loans, not subject to risk rating [Member] \| Originated In The Years 2010 2011 2012 2013 [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	137,084	139,860
0 - 29 Days Past Due	126,278	127,375
30 - 59 Days Past Due	90	60
60 - 89 Days Past Due	1,483	1,451
90-119 Days Past Due	589	1,459
120 - 364 Days Past Due	1,824	1,667
365+ Days Past Due	3,217	3,584
Financing Receivable, Individually Evaluated for Impairment	3,603	4,264
Originated loans, not subject to risk rating [Member] \| Originated In Years 2014, 2015, 2016 and 2017 [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	111,398	108,199
0 - 29 Days Past Due	109,594	106,672
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	232	123
90-119 Days Past Due	0	386
120 - 364 Days Past Due	811	210
365+ Days Past Due	761	761
Financing Receivable, Individually Evaluated for Impairment	0	47
Originated loans, not subject to risk rating [Member] \| NonTraditional Mortgage [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	21,342	22,859
0 - 29 Days Past Due	16,397	17,631
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	378	498
90-119 Days Past Due	299	366
120 - 364 Days Past Due	1,195	1,263
365+ Days Past Due	3,073	3,101
Financing Receivable, Individually Evaluated for Impairment	0	0
Originated loans, not subject to risk rating [Member] \| Loss Mitigation Program [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	102,898	103,528
0 - 29 Days Past Due	18,042	17,814
30 - 59 Days Past Due	1,618	2,304
60 - 89 Days Past Due	1,573	1,681
90-119 Days Past Due	994	388
120 - 364 Days Past Due	1,033	1,599
365+ Days Past Due	3,709	3,759
Financing Receivable, Individually Evaluated for Impairment	75,929	75,983
Originated loans, not subject to risk rating [Member] \| Total Traditional, non-traditional and loss mitigation program [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	699,551	711,476
0 - 29 Days Past Due	550,291	554,236
30 - 59 Days Past Due	1,708	2,529
60 - 89 Days Past Due	14,325	15,348
90-119 Days Past Due	4,530	6,513
120 - 364 Days Past Due	14,774	14,293
365+ Days Past Due	25,103	26,907
Financing Receivable, Individually Evaluated for Impairment	88,820	91,650
Originated loans, not subject to risk rating [Member] \| Home equity secured personal loans [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	339	337
0 - 29 Days Past Due	339	337
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
90-119 Days Past Due	0	0
120 - 364 Days Past Due	0	0
365+ Days Past Due	0	0
Financing Receivable, Individually Evaluated for Impairment	0	0
Originated loans, not subject to risk rating [Member] \| GNMA's Buy Back Option related
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	9,973	9,681
0 - 29 Days Past Due	0	(1)
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
90-119 Days Past Due	1,991	2,441
120 - 364 Days Past Due	4,153	3,141
365+ Days Past Due	3,829	4,100
Financing Receivable, Individually Evaluated for Impairment	0	0
Originated loans, not subject to risk rating [Member] \| Consumer Loan [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	300,412	290,515
0 - 29 Days Past Due	293,028	283,761
30 - 59 Days Past Due	3,983	3,298
60 - 89 Days Past Due	2,041	1,808
90-119 Days Past Due	972	1,273
120 - 364 Days Past Due	363	371
365+ Days Past Due	25	4
Financing Receivable, Individually Evaluated for Impairment	0	0
Originated loans, not subject to risk rating [Member] \| Credit Cards [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	26,940	26,358
0 - 29 Days Past Due	25,596	25,023
30 - 59 Days Past Due	641	527
60 - 89 Days Past Due	247	283
90-119 Days Past Due	145	191
120 - 364 Days Past Due	311	334
365+ Days Past Due	0	0
Financing Receivable, Individually Evaluated for Impairment	0	0
Originated loans, not subject to risk rating [Member] \| Overdrafts [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	236	207
0 - 29 Days Past Due	192	174
30 - 59 Days Past Due	12	16
60 - 89 Days Past Due	16	12
90-119 Days Past Due	3	1
120 - 364 Days Past Due	13	4
365+ Days Past Due	0	0
Financing Receivable, Individually Evaluated for Impairment	0	0
Originated loans, not subject to risk rating [Member] \| Unsecured personal lines of credit [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	2,307	2,404
0 - 29 Days Past Due	2,202	2,327
30 - 59 Days Past Due	25	41
60 - 89 Days Past Due	44	4
90-119 Days Past Due	0	3
120 - 364 Days Past Due	11	25
365+ Days Past Due	25	4
Financing Receivable, Individually Evaluated for Impairment	0	0
Originated loans, not subject to risk rating [Member] \| Unsecured personal loans [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	255,544	246,272
0 - 29 Days Past Due	249,982	241,227
30 - 59 Days Past Due	3,030	2,474
60 - 89 Days Past Due	1,701	1,489
90-119 Days Past Due	803	1,074
120 - 364 Days Past Due	28	8
365+ Days Past Due	0	0
Financing Receivable, Individually Evaluated for Impairment	0	0
Originated loans, not subject to risk rating [Member] \| Cash collateral personal loans [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	15,385	15,274
0 - 29 Days Past Due	15,056	15,010
30 - 59 Days Past Due	275	240
60 - 89 Days Past Due	33	20
90-119 Days Past Due	21	4
120 - 364 Days Past Due	0	0
365+ Days Past Due	0	0
Financing Receivable, Individually Evaluated for Impairment	0	0
Originated loans, not subject to risk rating [Member] \| Auto and Leasing [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	786,606	756,395
0 - 29 Days Past Due	716,985	686,493
30 - 59 Days Past Due	47,588	42,714
60 - 89 Days Past Due	14,324	19,014
90-119 Days Past Due	5,798	6,253
120 - 364 Days Past Due	1,911	1,921
365+ Days Past Due	0	0
Financing Receivable, Individually Evaluated for Impairment	0	0
Accounted For Under ASC 310-20, not subject to risk rating [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	73,524	85,888
0 - 29 Days Past Due	67,858	78,371
30 - 59 Days Past Due	3,435	4,436
60 - 89 Days Past Due	1,201	1,738
90-119 Days Past Due	580	663
120 - 364 Days Past Due	449	680
365+ Days Past Due	1	0
Financing Receivable, Individually Evaluated for Impairment	0	0
Accounted For Under ASC 310-20, not subject to risk rating [Member] \| Consumer Loan [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	31,001	32,862
0 - 29 Days Past Due	29,590	30,868
30 - 59 Days Past Due	560	784
60 - 89 Days Past Due	257	383
90-119 Days Past Due	233	248
120 - 364 Days Past Due	360	579
365+ Days Past Due	1	0
Financing Receivable, Individually Evaluated for Impairment	0	0
Accounted For Under ASC 310-20, not subject to risk rating [Member] \| Credit Cards [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	28,404	30,093
0 - 29 Days Past Due	27,087	28,281
30 - 59 Days Past Due	536	736
60 - 89 Days Past Due	235	369
90-119 Days Past Due	232	227
120 - 364 Days Past Due	314	480
365+ Days Past Due	0	0
Financing Receivable, Individually Evaluated for Impairment	0	0
Accounted For Under ASC 310-20, not subject to risk rating [Member] \| Unsecured personal loans [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	2,597	2,769
0 - 29 Days Past Due	2,503	2,587
30 - 59 Days Past Due	24	48
60 - 89 Days Past Due	22	14
90-119 Days Past Due	1	21
120 - 364 Days Past Due	46	99
365+ Days Past Due	1	0
Financing Receivable, Individually Evaluated for Impairment	0	0
Accounted For Under ASC 310-20, not subject to risk rating [Member] \| Auto Loan [Member]
Not Subject To Risk Rating [Line Items]
Loans and Leases Receivable, Gross, Carrying Amount	42,523	53,026
0 - 29 Days Past Due	38,268	47,503
30 - 59 Days Past Due	2,875	3,652
60 - 89 Days Past Due	944	1,355
90-119 Days Past Due	347	415
120 - 364 Days Past Due	89	101
365+ Days Past Due	0	0
Financing Receivable, Individually Evaluated for Impairment	$ 0	$ 0

Loans Receivable (Risk category of gross loans not subject to risk rating ) (Details) - USD ($)
$ in Thousands

Mar. 31, 2017

Dec. 31, 2016

Not Subject To Risk Rating [Line Items]

Loans and Leases Receivable, Gross, Carrying Amount

$ 4,188,441

$ 4,245,364

Financing Receivable, Individually Evaluated for Impairment

59,618

54,289

Loans, Not Subject To Risk Ratings [Member]

Not Subject To Risk Rating [Line Items]