Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Consolidated Statements of Changes in Stockholders' Equity [Abstract]
Restricted stock compensation expense, shares	351	0	351	4,908
Exercise of stock options, shares		5,460		7,798
Cash dividends- common stock per share	$ 0.07	$ 0.07	$ 0.21	$ 0.21
Non-cash funding of 401(k), shares	2,202	3,170	8,468	8,828
Non-cash funding of deferred comp. plan, shares	1,108	1,332	4,218	4,209