Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Cash Flow Elements [Abstract]
Interest	$ 4,306	$ 3,790	$ 2,415
Income taxes	3,863	6,855	811
Total interest and income taxes paid	8,169	10,645	3,226
Noncash or Part Noncash Acquisitions [Line Items]
Shares issued as payments for acquisitions	1,570	9,035	5,211
Series of Business Acquisitions | Common Stock
Noncash or Part Noncash Acquisitions [Line Items]
Shares issued as payments for acquisitions	0	0	2,489
Shares issued as payment of contingent consideration	1,570	9,034	2,723
Total shares issued for acquisition and contingent consideration	$ 1,570	$ 9,034	$ 5,212