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Deposits (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Maturities of certificates and other time deposits $100,000 or more    
2017 $ 396,106 $ 863,876
2018 641,428 263,958
2019 204,492 156,824
2020 79,154 67,739
2021 13,363 13,052
Thereafter 17,916  
Total 1,352,459 1,365,449
Time deposits disclosures    
Time Deposits, at or Above FDIC Insurance Limit of $ 250,000 553,200 490,700
Brokered time deposits $ 154,400 $ 97,900
Percentage of Interest-bearing Domestic Deposits to Deposits, Brokered 4.60% 2.90%