Supplemental Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2015

Supplemental Cash Flow Elements [Abstract]

Components of supplemental cash flow information

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

	Three months ended March 31,
	2015		2014
Supplemental non-cash investing and financing activities:
Value of common stock issued in acquisitions	$	1,014	$	1,750
Value of common stock issued in payment of accrued liability	—		600
Exercise of stock options by common stock surrender	66		1,005
Supplemental cash payment information:
Interest paid	$	309	$	360
Income taxes paid	1,911		2,039