Loans Receivable (Aging of recorded investment in gross loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 4,204,871	$ 4,245,364
Originated Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	36,092	57,678
60 - 89 Days Past Due	22,151	43,274
Greater than 90 Days Past Due	89,497	96,685
Total Past Due	147,740	197,637
Current	3,057,152	2,848,633
Total Loans	3,204,892	3,046,270
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	7,361	2,863
Originated Loan [Member] | Mortgage Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	8,345	10,574
60 - 89 Days Past Due	8,970	21,942
Greater than 90 Days Past Due	67,497	75,668
Total Past Due	84,812	108,184
Current	598,795	613,310
Total Loans	683,607	721,494
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	7,361	2,863
Originated Loan [Member] | Traditional loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	1,112	1,663
60 - 89 Days Past Due	5,313	14,239
Greater than 90 Days Past Due	36,763	44,716
Total Past Due	43,188	60,618
Current	510,345	524,471
Total Loans	553,533	585,089
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	2,380	1,139
Originated Loan [Member] | Originated Up To The Year 2002 [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	86	196
60 - 89 Days Past Due	938	2,176
Greater than 90 Days Past Due	3,537	3,371
Total Past Due	4,561	5,743
Current	41,579	44,542
Total Loans	46,140	50,285
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	467	158
Originated Loan [Member] | Originated In The Years 2003 And 2004 [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	92	156
60 - 89 Days Past Due	1,077	3,872
Greater than 90 Days Past Due	6,304	7,272
Total Past Due	7,473	11,300
Current	75,758	79,407
Total Loans	83,231	90,707
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Originated In The Year 2005 [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	101	0
60 - 89 Days Past Due	383	1,952
Greater than 90 Days Past Due	3,348	4,306
Total Past Due	3,832	6,258
Current	40,669	43,751
Total Loans	44,501	50,009
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	68	0
Originated Loan [Member] | Originated In The Year 2006 [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	242	506
60 - 89 Days Past Due	604	2,905
Greater than 90 Days Past Due	5,971	6,261
Total Past Due	6,817	9,672
Current	55,966	59,628
Total Loans	62,783	69,300
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	66	0
Originated Loan [Member] | Originated In The Years 2007 2008 And 2009 [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	358	409
60 - 89 Days Past Due	1,258	1,439
Greater than 90 Days Past Due	8,561	11,732
Total Past Due	10,177	13,580
Current	58,505	63,149
Total Loans	68,682	76,729
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	577	398
Originated Loan [Member] | Originated In The Years 2010 2011 2012 2013 [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	233	349
60 - 89 Days Past Due	978	1,772
Greater than 90 Days Past Due	7,393	10,417
Total Past Due	8,604	12,538
Current	116,674	127,322
Total Loans	125,278	139,860
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	1,202	583
Originated Loan [Member] | Originated In Years 2014, 2015, 2016 and 2017 [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	47
60 - 89 Days Past Due	75	123
Greater than 90 Days Past Due	1,649	1,357
Total Past Due	1,724	1,527
Current	121,194	106,672
Total Loans	122,918	108,199
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Home equity secured personal loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Current	256	337
Total Loans	256	337
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | NonTraditional Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	326	498
Greater than 90 Days Past Due	3,543	4,730
Total Past Due	3,869	5,228
Current	14,401	17,631
Total Loans	18,270	22,859
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Loss Mitigation Program [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	7,233	8,911
60 - 89 Days Past Due	3,331	7,205
Greater than 90 Days Past Due	18,923	16,541
Total Past Due	29,487	32,657
Current	73,793	70,871
Total Loans	103,280	103,528
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	4,981	1,724
Originated Loan [Member] | Total Traditional, non-traditional and loss mitigation program [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	8,345	10,574
60 - 89 Days Past Due	8,970	21,942
Greater than 90 Days Past Due	59,229	65,987
Total Past Due	76,544	98,503
Current	598,539	612,973
Total Loans	675,083	711,476
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	7,361	2,863
Originated Loan [Member] | GNMA's Buy Back Option related
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	8,268	9,681
Total Past Due	8,268	9,681
Current	0	0
Total Loans	8,268	9,681
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	1,581	1,092
60 - 89 Days Past Due	1,039	510
Greater than 90 Days Past Due	15,888	11,197
Total Past Due	18,508	12,799
Current	1,288,753	1,265,067
Total Loans	1,307,261	1,277,866
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Commercial Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	1,117	154
60 - 89 Days Past Due	936	410
Greater than 90 Days Past Due	13,340	10,167
Total Past Due	15,393	10,731
Current	762,361	762,932
Total Loans	777,754	773,663
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Corporate Commercial Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Current	235,426	242,770
Total Loans	235,426	242,770
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Institutional Commercial Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	118	254
Total Past Due	118	254
Current	44,648	26,546
Total Loans	44,766	26,800
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Middle Market Commercial Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	765	0
60 - 89 Days Past Due	0	60
Greater than 90 Days Past Due	3,527	3,319
Total Past Due	4,292	3,379
Current	225,649	231,602
Total Loans	229,941	234,981
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Retail Commercial Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	352	154
60 - 89 Days Past Due	936	350
Greater than 90 Days Past Due	9,695	6,594
Total Past Due	10,983	7,098
Current	235,084	242,630
Total Loans	246,067	249,728
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Floor Plan Commercial Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Current	3,998	2,989
Total Loans	3,998	2,989
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Real Estate Commercial Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Current	17,556	16,395
Total Loans	17,556	16,395
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Other Commercial and Industrial[Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	464	938
60 - 89 Days Past Due	103	100
Greater than 90 Days Past Due	2,548	1,030
Total Past Due	3,115	2,068
Current	526,392	502,135
Total Loans	529,507	504,203
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Corporate Other Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Current	170,015	136,438
Total Loans	170,015	136,438
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Institutional Other Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Current	125,591	180,285
Total Loans	125,591	180,285
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Middle Market Other Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	881	0
Total Past Due	881	0
Current	84,482	81,633
Total Loans	85,363	81,633
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Retail Other Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	455	930
60 - 89 Days Past Due	103	100
Greater than 90 Days Past Due	1,616	969
Total Past Due	2,174	1,999
Current	111,078	71,706
Total Loans	113,252	73,705
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Floor Plan Other Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	9	8
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	51	61
Total Past Due	60	69
Current	35,226	32,073
Total Loans	35,286	32,142
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	4,406	3,298
60 - 89 Days Past Due	1,743	1,808
Greater than 90 Days Past Due	1,880	1,647
Total Past Due	8,029	6,753
Current	322,010	283,762
Total Loans	330,039	290,515
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	246	527
60 - 89 Days Past Due	130	283
Greater than 90 Days Past Due	1,227	525
Total Past Due	1,603	1,335
Current	26,827	25,023
Total Loans	28,430	26,358
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Overdrafts [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	20	16
60 - 89 Days Past Due	6	12
Greater than 90 Days Past Due	31	5
Total Past Due	57	33
Current	157	174
Total Loans	214	207
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Unsecured personal lines of credit [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	259	41
60 - 89 Days Past Due	54	4
Greater than 90 Days Past Due	87	32
Total Past Due	400	77
Current	1,820	2,327
Total Loans	2,220	2,404
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Unsecured personal loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	3,778	2,474
60 - 89 Days Past Due	1,494	1,489
Greater than 90 Days Past Due	223	1,081
Total Past Due	5,495	5,044
Current	278,982	241,228
Total Loans	284,477	246,272
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Cash collateral personal loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	103	240
60 - 89 Days Past Due	59	20
Greater than 90 Days Past Due	312	4
Total Past Due	474	264
Current	14,224	15,010
Total Loans	14,698	15,274
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Originated Loan [Member] | Auto and Leasing [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	21,760	42,714
60 - 89 Days Past Due	10,399	19,014
Greater than 90 Days Past Due	4,232	8,173
Total Past Due	36,391	69,901
Current	847,594	686,494
Total Loans	883,985	756,395
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Acquired BBVAPR Accounted for under ASC 310-20 [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	985	4,566
60 - 89 Days Past Due	436	1,772
Greater than 90 Days Past Due	2,804	1,797
Total Past Due	4,225	8,135
Current	51,039	83,315
Total Loans	55,264	91,450
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Commercial Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	36	130
60 - 89 Days Past Due	0	34
Greater than 90 Days Past Due	1,270	452
Total Past Due	1,306	616
Current	3,074	4,946
Total Loans	4,380	5,562
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Commercial Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	33
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	1,047	329
Total Past Due	1,047	362
Current	393	2,171
Total Loans	1,440	2,533
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Retail Commercial Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	33
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	119	110
Total Past Due	119	143
Current	0	0
Total Loans	119	143
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Floor Plan Commercial Secured [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	928	219
Total Past Due	928	219
Current	393	2,171
Total Loans	1,321	2,390
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Other Commercial and Industrial[Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	36	97
60 - 89 Days Past Due	0	34
Greater than 90 Days Past Due	223	123
Total Past Due	259	254
Current	2,681	2,775
Total Loans	2,940	3,029
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Retail Other Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	36	97
60 - 89 Days Past Due	0	34
Greater than 90 Days Past Due	221	121
Total Past Due	257	252
Current	2,681	2,775
Total Loans	2,938	3,027
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Floor Plan Other Commercial [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	0	0
60 - 89 Days Past Due	0	0
Greater than 90 Days Past Due	2	2
Total Past Due	2	2
Current	0	0
Total Loans	2	2
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Consumer Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	347	784
60 - 89 Days Past Due	188	383
Greater than 90 Days Past Due	1,355	828
Total Past Due	1,890	1,995
Current	27,025	30,867
Total Loans	28,915	32,862
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	208	736
60 - 89 Days Past Due	127	369
Greater than 90 Days Past Due	1,310	708
Total Past Due	1,645	1,813
Current	24,822	28,280
Total Loans	26,467	30,093
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Unsecured personal loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	139	48
60 - 89 Days Past Due	61	14
Greater than 90 Days Past Due	45	120
Total Past Due	245	182
Current	2,203	2,587
Total Loans	2,448	2,769
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	0	0
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Auto Loan [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30 - 59 Days Past Due	602	3,652
60 - 89 Days Past Due	248	1,355
Greater than 90 Days Past Due	179	517
Total Past Due	1,029	5,524
Current	20,940	47,502
Total Loans	21,969	53,026
Financing Receivable Recorded Investment 90 Days Past Due And Stil lAccruing	$ 0	$ 0