Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2015

Supplemental Cash Flow Elements [Abstract]

Details of Supplemental Cash Flow Information

Supplemental cash flow information is as follows for the year ended December 31 (in thousands):

	2015		2014		2013
Cash paid during the period for:
Income taxes, net	$	25,395	$	52,565	$	14,789
Interest, net	$	1,609	$	1,048	$	800
Non-Cash Transaction Information:
Shares tendered in payment of exercise price of stock options	$	—	$	84	$	—
Employee stock purchase plan	$	578	$	699	$	613
Equipment acquired under capital leases	$	1,470	$	313	$	1,929
Unsettled repurchases of common stock	$	1,012	$	1,425	$	—
Contingent consideration for acquisition	$	—	$	477	$	—