Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Receivables allowance	$ 5,775	$ 6,098
Preferred stock, undesignated, par (in Dollars per share)	$ 0.10	$ 0.10
Preferred stock, undesignated, shares authorized (in Shares)	2,000,000	2,000,000
Preferred stock, undesignated, shares outstanding (in Shares)	0	0
Common stock, par (in Dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in Shares)	125,000,000	125,000,000
Common stock, shares issued (in Shares)	32,462,542	33,956,304
Common stock, shares outstanding (in Shares)	32,462,542	33,956,304