Fair Value (Carrying Amounts and Estimated Fair Values of Company's Financial Instruments) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Financial Assets:
Interest-bearing Time Deposits with Banks	$ 1,985	$ 250
Loans, Net	3,041,038	2,712,236
Financial Liabilities:
Time Deposits	(693,632)	(588,483)
Level 1
Financial Assets:
Cash and Short-term Investments	64,791	64,549
Interest-bearing Time Deposits with Banks	0	0
Loans, Net	0	0
Accrued Interest Receivable	0	0
Financial Liabilities:
Demand, Savings, and Money Market Deposits	(2,737,654)	(2,848,149)
Time Deposits	0	0
Short-term Borrowings	(92,000)	(204,500)
Long-term Debt	0	0
Accrued Interest Payable	0	0
Level 2
Financial Assets:
Cash and Short-term Investments	24,343	32,001
Interest-bearing Time Deposits with Banks	1,985	250
Loans, Net	0	0
Accrued Interest Receivable	4,347	4,143
Financial Liabilities:
Demand, Savings, and Money Market Deposits	0	0
Time Deposits	(685,518)	(586,338)
Short-term Borrowings	(34,123)	(45,274)
Long-term Debt	(152,854)	(117,513)
Accrued Interest Payable	(2,798)	(1,718)
Level 3
Financial Assets:
Cash and Short-term Investments	0	0
Interest-bearing Time Deposits with Banks	0	0
Loans, Net	3,027,538	2,689,393
Accrued Interest Receivable	13,477	12,491
Financial Liabilities:
Demand, Savings, and Money Market Deposits	0	0
Time Deposits	0	0
Short-term Borrowings	0	0
Long-term Debt	(15,168)	(11,315)
Accrued Interest Payable	(36)	(22)
Carrying Value
Financial Assets:
Cash and Short-term Investments	89,134	96,550
Interest-bearing Time Deposits with Banks	1,985	250
Loans, Net	3,037,862	2,707,498
Accrued Interest Receivable	17,824	16,634
Financial Liabilities:
Demand, Savings, and Money Market Deposits	(2,737,654)	(2,484,149)
Time Deposits	(693,632)	(588,483)
Short-term Borrowings	(126,123)	(249,774)
Long-term Debt	(190,516)	(126,635)
Accrued Interest Payable	(2,834)	(1,740)
Total
Financial Assets:
Cash and Short-term Investments	89,134	96,550
Interest-bearing Time Deposits with Banks	1,985	250
Loans, Net	3,027,538	2,689,393
Accrued Interest Receivable	17,824	16,634
Financial Liabilities:
Demand, Savings, and Money Market Deposits	(2,737,654)	(2,848,149)
Time Deposits	(685,518)	(586,338)
Short-term Borrowings	(126,123)	(249,774)
Long-term Debt	(168,022)	(128,828)
Accrued Interest Payable	$ (2,834)	$ (1,740)