Other Borrowings (Schedule of Other Borrowings) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Long-term debt	$ 275,773	$ 274,905
Advances from the FHLB
Debt Instrument [Line Items]
Long-term debt	$ 2,835	$ 3,399
Weighted average interest rate	4.08%	4.03%
Trust preferred securities
Debt Instrument [Line Items]
Long-term debt	$ 145,343	$ 130,913
Senior notes
Debt Instrument [Line Items]
Long-term debt	0	5,000
Note payable to unaffiliated bank
Debt Instrument [Line Items]
Long-term debt	51,417	58,417
Contracts payable for purchase of real estate and other assets
Debt Instrument [Line Items]
Long-term debt	1,892	1,953
Subordinated notes
Debt Instrument [Line Items]
Long-term debt	74,286	74,143
Other borrowings
Debt Instrument [Line Items]
Long-term debt	$ 0	$ 1,080