Supplemental Cash Flow Information

12 Months Ended

Dec. 31, 2014

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



	Year ended December 31,
	2014		2013		2012
Supplemental non-cash investing and financing activities:
Value of common stock issued in acquisitions	$	2,043	$	52,711	$	—
Final Florida Chemical acquisition adjustment	1,162		—		—
Fair value of warrant liability reclassified to additional paid-in capital	—		—		13,973
Value of common stock issued in payment of accrued liability	600		—		—
Equipment acquired through capital leases	—		754		1,263
Exercise of stock options by common stock surrender	1,198		3,907		—

Supplemental cash payment information:
Interest paid	$	1,285	$	1,859	$	5,521
Income taxes paid	22,389		17,783		14,049