Long-Term Debt (Long-Term Debt) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Mar. 09, 2015
Debt Instrument [Line Items]
Gross long-term debt	$ 237,890
Less: unamortized debt issuance costs	(4,428)	$ (4,605)
Total long-term debt	233,462	224,993
Subordinated Notes [Member] | Subordinated Notes Payable, Maturing June 2045 [Member]
Debt Instrument [Line Items]
Gross long-term debt	150,000	150,000	$ 150,000
Less: unamortized debt issuance costs	(4,428)
Other Long-Term Debt [Member]
Debt Instrument [Line Items]
Gross long-term debt	$ 87,890	$ 79,598