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Deposits and Related Interest (Tables) | 6 Months Ended
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Jun. 30, 2018
Deposits, by Component, Alternative [Abstract] |
Deposits By Component [Table Text Block] |
| June 30, |  | December 31,
| 2018 |  | 2017
| (In thousands)
Non-interest bearing demand deposits | $ | 1,110,738 |  | $ | 969,525
Interest-bearing savings and demand deposits |  | 2,285,357 |  |  | 2,274,116
Individual retirement accounts |  | 208,807 |  |  | 231,376
Retail certificates of deposit |  | 601,687 |  |  | 595,983
Institutional certificates of deposit |  | 212,187 |  |  | 209,951
Total core deposits |  | 4,418,776 |  |  | 4,280,951
Brokered deposits |  | 461,425 |  |  | 518,531
Total deposits | $ | 4,880,201 |  | $ | 4,799,482
Interest Expense Domestic Deposit Liabilities [Table Text Block] |
| Quarter Ended June 30, |  | Six-Month Period Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
| (In thousands)
Demand and savings deposits | $ | 2,956 |  | $ | 2,939 |  | $ | 5,768 |  | $ | 5,848
Certificates of deposit |  | 4,695 |  |  | 4,713 |  |  | 9,181 |  |  | 9,157
| $ | 7,651 |  | $ | 7,652 |  | $ | 14,949 |  | $ | 15,005
Maturities Of Time Deposits [Table Text Block] |
| June 30, |  | December 31,
|  | 2018 |  |  | 2017
| (In thousands)
Within one year: |  |  |  |  |
Three (3) months or less | $ | 286,623 |  | $ | 316,382
Over 3 months through 1 year |  | 505,206 |  |  | 508,285
|  | 791,829 |  |  | 824,667
Over 1 through 2 years |  | 468,489 |  |  | 470,670
Over 2 through 3 years |  | 111,344 |  |  | 137,016
Over 3 through 4 years |  | 30,850 |  |  | 36,125
Over 4 through 5 years |  | 45,630 |  |  | 38,623
| $ | 1,448,142 |  | $ | 1,507,101

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