Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2015

Supplemental cash flow information is as follows (in thousands):



	Year ended December 31,
	2015		2014		2013
Supplemental non-cash investing and financing activities:
Value of common stock issued in acquisitions	$	1,014	$	2,043	$	52,711
Final Florida Chemical acquisition adjustment	—		1,162		—
Value of common stock issued in payment of accrued liability	—		600		—
Equipment acquired through capital leases	—		—		754
Exercise of stock options by common stock surrender	1,332		1,198		3,907

Supplemental cash payment information:
Interest paid	$	1,398	$	1,285	$	1,859
Income taxes paid, net of refunds	1,547		22,389		17,783