Loans Receivable (Accretable yield and non-accretable discount activity of acquired Eurobank loans) (Details) - Acquired Loans In An F D I C Assisted Transaction [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	$ 64,508	$ 84,391	$ 109,859
Accretion Accretable	20,560	30,498	52,411
Change in expected cash flow	2,665	14,456	34,497
Transfer from (to) non-accretable discount	3,059	(3,841)	(7,554)
Balance at end of period	49,672	64,508	84,391
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Non Accretable Discount Movement Schedule [Roll Forward]
Balance at beginning of period	12,340	21,156	62,410
Change in actual and expected losses	(3,436)	(12,657)	(48,808)
Transfer (to) from accretable yield	(3,059)	3,841	7,554
Balance at end of period	5,845	12,340	21,156
Mortgage
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	45,839	51,954	47,636
Accretion Accretable	7,180	8,942	13,685
Change in expected cash flow	121	2,134	4,631
Transfer from (to) non-accretable discount	2,694	693	13,372
Balance at end of period	41,474	45,839	51,954
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Non Accretable Discount Movement Schedule [Roll Forward]
Balance at beginning of period	8,441	12,869	27,348
Change in actual and expected losses	(1,171)	(3,735)	(1,107)
Transfer (to) from accretable yield	(2,694)	(693)	(13,372)
Balance at end of period	4,576	8,441	12,869
Commercial and Other Construction Loan [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	16,475	26,970	37,920
Accretion Accretable	12,985	19,593	32,124
Change in expected cash flow	1,881	13,722	44,660
Transfer from (to) non-accretable discount	1,380	(4,624)	(23,486)
Balance at end of period	6,751	16,475	26,970
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Non Accretable Discount Movement Schedule [Roll Forward]
Balance at beginning of period	3,880	0	24,464
Change in actual and expected losses	(2,224)	(744)	(47,950)
Transfer (to) from accretable yield	(1,380)	4,624	23,486
Balance at end of period	276	3,880	0
Construction and development secured by family properties [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	2,194	2,255	20,753
Accretion Accretable	82	90	2,513
Change in expected cash flow	121	1	(15,048)
Transfer from (to) non-accretable discount	(786)	28	(937)
Balance at end of period	1,447	2,194	2,255
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Non Accretable Discount Movement Schedule [Roll Forward]
Balance at beginning of period	11	0	0
Change in actual and expected losses	(39)	39	(937)
Transfer (to) from accretable yield	786	(28)	937
Balance at end of period	758	11	0
Auto and Leasing [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	0	0	2,479
Accretion Accretable	30	60	3,458
Change in expected cash flow	(217)	(15)	(51)
Transfer from (to) non-accretable discount	247	75	1,030
Balance at end of period	0	0	0
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Non Accretable Discount Movement Schedule [Roll Forward]
Balance at beginning of period	0	0	0
Change in actual and expected losses	247	75	1,030
Transfer (to) from accretable yield	(247)	(75)	(1,030)
Balance at end of period	0	0	0
Consumer Loan [Member]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield Movement Schedule [Roll Forward]
Balance at beginning of period	0	3,212	1,071
Accretion Accretable	283	1,813	631
Change in expected cash flow	759	(1,386)	305
Transfer from (to) non-accretable discount	(476)	(13)	2,467
Balance at end of period	0	0	3,212
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Non Accretable Discount Movement Schedule [Roll Forward]
Balance at beginning of period	8	8,287	10,598
Change in actual and expected losses	(249)	(8,292)	156
Transfer (to) from accretable yield	476	13	(2,467)
Balance at end of period	$ 235	$ 8	$ 8,287