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Deposits and Related Interest (Tables) | 9 Months Ended
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Sep. 30, 2018
Deposits, by Component, Alternative [Abstract] |
Deposits By Component [Table Text Block] |
| September 30, |  | December 31,
| 2018 |  | 2017
| (In thousands)
Non-interest bearing demand deposits | $ | 1,107,567 |  | $ | 969,525
Interest-bearing savings and demand deposits |  | 2,412,690 |  |  | 2,274,116
Individual retirement accounts |  | 204,715 |  |  | 231,376
Retail certificates of deposit |  | 610,118 |  |  | 595,983
Institutional certificates of deposit |  | 223,025 |  |  | 209,951
Total core deposits |  | 4,558,115 |  |  | 4,280,951
Brokered deposits |  | 530,878 |  |  | 518,531
Total deposits | $ | 5,088,993 |  | $ | 4,799,482
Interest Expense Domestic Deposit Liabilities [Table Text Block] |
| Quarter Ended September 30, |  | Nine-Month Period Ended September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
| (In thousands)
Demand and savings deposits | $ | 3,157 |  | $ | 2,715 |  | $ | 8,924 |  | $ | 8,563
Certificates of deposit |  | 5,448 |  |  | 4,886 |  |  | 14,630 |  |  | 14,043
| $ | 8,605 |  | $ | 7,601 |  | $ | 23,554 |  | $ | 22,606
Maturities Of Time Deposits [Table Text Block] |
| September 30, |  | December 31,
|  | 2018 |  |  | 2017
| (In thousands)
Within one year: |  |  |  |  |
Three (3) months or less | $ | 239,716 |  | $ | 316,382
Over 3 months through 1 year |  | 578,308 |  |  | 508,285
|  | 818,024 |  |  | 824,667
Over 1 through 2 years |  | 506,842 |  |  | 470,670
Over 2 through 3 years |  | 137,738 |  |  | 137,016
Over 3 through 4 years |  | 31,088 |  |  | 36,125
Over 4 through 5 years |  | 45,100 |  |  | 38,623
| $ | 1,538,792 |  | $ | 1,507,101

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