Short-Term Borrowings - Tabular (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Short-term borrowings
Balance as of end of period	$ 0		$ 0		$ 93,460
Federal Funds Purchased
Short-term borrowings
Balance as of end of period		$ 73,930		$ 73,930	$ 93,500
Average daily balance	61,386	103,171	82,504	87,391
Maximum month-end balance	$ 124,250	$ 94,410	$ 139,605	$ 112,260
During period	2.40%	2.21%	2.54%	0.36%
End of period	2.30%	2.30%	2.30%	2.30%
Federal Home Loan Bank Advances
Short-term borrowings
Average daily balance	$ 25,815		$ 12,985	$ 110
Maximum month-end balance			$ 135,000
During period	2.58%		2.44%	2.43%