Borrowings Maturities Table (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Debt Instrument [Line Items]
Less than 1 Year	$ 971,791
1-2 Years	11,319
2-3 Years	0
3-4 Years	0
4-5 Years	0
Thereafter	5,467
Total	988,577
Other borrowings:
Debt Instrument [Line Items]
Less than 1 Year	9,626
1-2 Years	0
2-3 Years	0
3-4 Years	0
4-5 Years	0
Thereafter	0
Total	9,626
Federal Home Loan Bank borrowings:
Debt Instrument [Line Items]
Less than 1 Year	962,165
1-2 Years	11,319
2-3 Years	0
3-4 Years	0
4-5 Years	0
Thereafter	5,467
Total	$ 978,951