Consolidated Statements of Changes in Shareholders' Equity (unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Forfeiture of restricted stock award grants (in shares)	2,699		2,699	130
Performance-based restricted stock award (in shares)	798		798
Cash dividends declared (in dollars per share)	$ 0.17	$ 0.165	$ 0.51	$ 0.50
Restricted stock award grants (in shares)			39,790	37,708
Purchase of treasury stock (in shares)			40,000	10,769
Restricted Stock
Purchase of treasury stock (in shares)	217		9,305	6,119
Performance Shares
Purchase of treasury stock (in shares)	294		294