Consolidated Statements of Stockholders' Equity Parentheticals - $ / shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Common Stock, Dividends, Per Share, Cash Paid	$ 0.24	$ 0.22
Common Stock [Member]
Shares of common stock issued	63,434	72,811
Stock Repurchased During Period, Shares	0	0
Stock Issued During Period, Shares, Share-based Compensation, Gross	2,457	0
Stock Issued During Period, Shares, Share-based Compensation, Forfeited	(126,752)	(87,419)
Shares of stock withheld for employee taxes	(112,565)	(62,087)
Common Stock, Dividends, Per Share, Cash Paid	$ 0.24	$ 0.22