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Loans (Recorded Investment in loans individually evaluated for impairment) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Financing Receivable, Impaired [Line Items] |  |
Allowance for loan and lease losses | $ 164,231 | $ 167,509
Originated Loan [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | 188,536 | 174,915
Recorded Investment | 165,403 | 156,941
Allowance for loan and lease losses | $ 18,620 | $ 19,694
Coverage | 0.11% | 0.13%
Acquired BBVAPR Accounted for under ASC 310-20 [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 926 | $ 926
Recorded Investment | 747 | 747
Allowance for loan and lease losses | $ 14 | $ 20
Coverage | 0.02% | 0.03%
Acquired BBVAPR Accounted under ASC 310-30 [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 701,501 | $ 843,423
Recorded Investment | 688,083 | 818,303
Allowance for loan and lease losses | $ 42,010 | $ 45,755
Coverage | 0.06% | 0.06%
Eurobank Acquired Loans |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 117,510 | $ 139,246
Recorded Investment | 111,230 | 123,335
Allowance for loan and lease losses | $ 24,971 | $ 25,174
Coverage | 0.22% | 0.20%
Commercial impaired loans with specific allowance [Member] | Originated Loan [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 54,636 | $ 57,922
Recorded Investment | 49,092 | 52,585
Allowance for loan and lease losses | $ 8,434 | $ 10,573
Coverage | 0.17% | 0.20%
Commercial impaired loans with specific allowance [Member] | Acquired BBVAPR Accounted for under ASC 310-20 [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 926 | $ 926
Recorded Investment | 747 | 747
Allowance for loan and lease losses | $ 14 | $ 20
Coverage | 0.02% | 0.03%
Residential troubled-debt restructuring impaired loans with specific allowance [Member] | Originated Loan [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 95,659 | $ 94,971
Recorded Investment | 84,174 | 85,403
Allowance for loan and lease losses | $ 10,186 | $ 9,121
Coverage | 0.12% | 0.11%
Commercial impaired loans with no specific allowance financing receivable | Originated Loan [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 38,241 | $ 22,022
Recorded Investment | $ 32,137 | $ 18,953
Coverage | 0.00% | 0.00%
Commercial impaired loans with no specific allowance financing receivable | Acquired BBVAPR Accounted for under ASC 310-20 [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 0 | $ 0
Recorded Investment | $ 0 | $ 0
Coverage | 0.00% | 0.00%
Mortgage impaired loan pool [Member] | Acquired BBVAPR Accounted under ASC 310-30 [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 498,537 | $ 547,064
Recorded Investment | 492,890 | 532,052
Allowance for loan and lease losses | $ 15,225 | $ 14,085
Coverage | 0.03% | 0.03%
Commercial impaired loan pool [Member] | Acquired BBVAPR Accounted under ASC 310-30 [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 188,413 | $ 250,451
Recorded Investment | 180,790 | 241,124
Allowance for loan and lease losses | $ 20,641 | $ 23,691
Coverage | 0.11% | 0.10%
Auto impaired loan pool. | Acquired BBVAPR Accounted under ASC 310-30 [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 14,551 | $ 43,440
Recorded Investment | 14,403 | 43,696
Allowance for loan and lease losses | $ 6,144 | $ 7,961
Coverage | 0.43% | 0.18%
Consumer impaired loan pool. | Acquired BBVAPR Accounted under ASC 310-30 [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal |  | $ 2,468
Recorded Investment |  | 1,431
Allowance for loan and lease losses |  | $ 18
Coverage |  | 0.01%
Consumer impaired loan pool. | Eurobank Acquired Loans |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 15 | $ 15
Recorded Investment | 4 | 4
Allowance for loan and lease losses | $ 4 | $ 4
Coverage | 1.00% | 1.00%
Loans secured by 1-4 family residential properties, covered [Member] | Eurobank Acquired Loans |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 70,153 | $ 81,132
Recorded Investment | 63,406 | 69,538
Allowance for loan and lease losses | $ 15,382 | $ 15,187
Coverage | 0.24% | 0.22%
Commercial and Other Construction Loan [Member] | Eurobank Acquired Loans |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid Principal | $ 47,342 | $ 58,099
Recorded Investment | 47,820 | 53,793
Allowance for loan and lease losses | $ 9,585 | $ 9,983
Coverage | 0.20% | 0.19%

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