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Allowance for Loan and Lease Losses (Allowance for Acquired Eurobank Loan and Lease Losses) (Details) - Eurobank Acquired Loans - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Loan Receivable Type
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	$ 25,174	$ 21,281
Provision for loan and lease losses, net	139	1,620
Allowance de-recognition from new policy	97	(895)
Balance at end of period	25,410	22,006
Loans secured by 1-4 family residential properties, covered [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	15,187	11,947
Provision for loan and lease losses, net	179	2,398
Allowance de-recognition from new policy	48	(177)
Balance at end of period	15,414	14,168
Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	9,982	9,328
Provision for loan and lease losses, net	(40)	(778)
Allowance de-recognition from new policy	49	(717)
Balance at end of period	9,991	7,833
Consumer Loan [Member]
Allowance for Loan and Lease Losses [Roll Forward]
Balance at beginning of period	5	6
Provision for loan and lease losses, net	0	0
Allowance de-recognition from new policy	0	(1)
Balance at end of period	$ 5	$ 5

X

- Definition

The Company changed the purchase credit impaired policy for all loans accounted for under ASC 310-30. Under the new policy, the Company writes-off the loans recorded investment and derecognizes the associated allowance for loan and lease losses for loans that exit the pools.

+ References

No definition available.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

A valuation allowance for financing receivables that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

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X

- Definition

Amount of expense related to estimated loss from loan and lease transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

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