Consolidated Statements of Stockholders' Equity Parentheticals - $ / shares	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Shares of common stock issued	72,811	76,611
Stock Repurchased During Period, Shares	0	(399,442)
Stock Issued During Period, Shares, Share-based Compensation, Gross	0	587,628
Stock Issued During Period, Shares, Share-based Compensation, Forfeited	(87,419)	(303,583)
Shares of stock withheld for employee taxes	(62,087)	(63,235)
Common Stock, Dividends, Per Share, Cash Paid	$ 0.22	$ 0.20