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Deposits and Related Interest (Tables) | 12 Months Ended
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Dec. 31, 2018
Deposits, by Component, Alternative [Abstract] |
Deposits By Component [Table Text Block] |
| December 31,
| 2018 |  | 2017
| (In thousands)
Non-interest bearing demand deposits | $ | 1,105,324 |  | $ | 969,525
Interest-bearing savings and demand deposits |  | 2,274,423 |  |  | 2,274,116
Retail certificates of deposit |  | 805,712 |  |  | 827,359
Institutional certificates of deposit |  | 197,559 |  |  | 209,951
Total core deposits |  | 4,383,018 |  |  | 4,280,951
Brokered deposits |  | 525,097 |  |  | 518,531
Total deposits | $ | 4,908,115 |  | $ | 4,799,482
Interest Expense Domestic Deposit Liabilities [Table Text Block] |
| Year Ended December 31,
| 2018 |  | 2017 |  | 2016
| (In thousands)
Demand and savings deposits | $ | 12,478 |  | $ | 11,426 |  | $ | 12,004
Certificates of deposit |  | 20,475 |  |  | 18,872 |  |  | 17,249
| $ | 32,953 |  | $ | 30,298 |  | $ | 29,253
Maturities Of Time Deposits [Table Text Block] |
| December 31,
|  | 2018 |  |  | 2017
| (In thousands)
Within one year: |  |  |  |  |
Three (3) months or less | $ | 305,088 |  | $ | 316,382
Over 3 months through 1 year |  | 545,363 |  |  | 508,285
|  | 850,451 |  |  | 824,667
Over 1 through 2 years |  | 484,197 |  |  | 470,670
Over 2 through 3 years |  | 89,340 |  |  | 137,016
Over 3 through 4 years |  | 34,018 |  |  | 36,125
Over 4 through 5 years |  | 42,998 |  |  | 38,623
| $ | 1,501,004 |  | $ | 1,507,101

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