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Deposits and Related Interest (Tables) | 9 Months Ended
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Sep. 30, 2017
Deposits, by Component, Alternative [Abstract] |
Deposits By Component [Table Text Block] |
| September 30, |  | December 31,
| 2017 |  | 2016
| (In thousands)
Non-interest bearing demand deposits | $ | 900,063 |  | $ | 848,502
Interest-bearing savings and demand deposits |  | 2,337,174 |  |  | 2,219,452
Individual retirement accounts |  | 235,265 |  |  | 265,754
Retail certificates of deposit |  | 596,854 |  |  | 563,965
Institutional certificates of deposit |  | 221,448 |  |  | 190,419
Total core deposits |  | 4,290,804 |  |  | 4,088,092
Brokered deposits |  | 535,600 |  |  | 576,395
Total deposits | $ | 4,826,404 |  | $ | 4,664,487
Interest Expense Domestic Deposit Liabilities [Table Text Block] |
| Quarter Ended September 30, | Nine-Month Period Ended September 30,
| 2017 |  | 2016 |  | 2017 |  | 2016 |
| (In thousands) |  |  |  |  |  |
Demand and savings deposits | $ | 2,715 |  | $ | 3,035 |  | $ | 8,563 |  | $ | 9,061 |
Certificates of deposit |  | 4,886 |  |  | 4,296 |  |  | 14,043 |  |  | 12,761 |
| $ | 7,601 |  | $ | 7,331 |  | $ | 22,606 |  | $ | 21,822 |
Maturities Of Time Deposits [Table Text Block] |
| September 30, 2017 |  | December 31, 2016
| (In thousands)
Within one year: |  |  |  |  |
Three (3) months or less | $ | 271,981 |  | $ | 277,621
Over 3 months through 1 year |  | 577,067 |  |  | 534,548
|  | 849,048 |  |  | 812,169
Over 1 through 2 years |  | 448,068 |  |  | 488,440
Over 2 through 3 years |  | 168,084 |  |  | 154,545
Over 3 through 4 years |  | 37,303 |  |  | 29,701
Over 4 through 5 years |  | 35,981 |  |  | 41,949
| $ | 1,538,484 |  | $ | 1,526,804

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