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Allowance for Loan and Lease Losses (Composition of the Company's allowance for loan and lease losses) (Details) - USD ($) | Mar. 31, 2017 | Dec. 31, 2016
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Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | $ 121,034,000 | $ 115,937,000
Acquired BBVAPR loans [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 38,545,000 | 35,356,000
Acquired BBVAPR Accounted for under ASC 310-20 [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 3,615,000 | 4,300,000
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Commercial Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 183,000 | 169,000
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Consumer Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 2,591,000 | 3,028,000
Acquired BBVAPR Accounted for under ASC 310-20 [Member] | Auto Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 841,000 | 1,103,000
Acquired BBVAPR accounted under ASC 310-30 [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 34,930,000 | 31,056,000
Acquired BBVAPR accounted under ASC 310-30 [Member] | Mortgage Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 3,573,000 | 2,682,000
Acquired BBVAPR accounted under ASC 310-30 [Member] | Commercial Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 23,528,000 | 23,452,000
Acquired BBVAPR accounted under ASC 310-30 [Member] | Auto Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 7,829,000 | 4,922,000
Eurobank Acquired Loans |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 22,006,000 | 21,281,000
Originated Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 60,483,000 | 59,300,000
Originated Loan [Member] | Mortgage Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 18,578,000 | 17,344,000
Originated Loan [Member] | Commercial Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 9,888,000 | 8,995,000
Originated Loan [Member] | Consumer Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 13,394,000 | 13,067,000
Originated Loan [Member] | Auto and Leasing [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 18,621,000 | 19,463,000
Originated Loan [Member] | Unallocated [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 2,000 | 431,000
Acquired loans [Member] | Eurobank Acquired Loans |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 22,006,000 | 21,281,000
Acquired loans [Member] | Eurobank Acquired Loans | Consumer Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 5,000 | 6,000
Acquired loans [Member] | Eurobank Acquired Loans | Loans secured by 1-4 family residential properties, covered [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | 14,168,000 | 11,947,000
Acquired loans [Member] | Eurobank Acquired Loans | Commercial and Other Construction Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Allowance for loan and lease losses | $ 7,833,000 | $ 9,328,000

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + 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 (g) -URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953423-111524 Reference 2: 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=49124121&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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