Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2017

Supplemental Cash Flow Elements [Abstract]

Details of Supplemental Cash Flow Information

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

	2017		2016		2015
Cash paid during the year for:
Income taxes, net	$	24,330	$	21,324	$	25,395
Interest, net	$	3,518	$	2,101	$	1,609
Non-Cash Financing and Investing Transactions:
Receivable for sale of Global's assets	$	1,979	$	—	$	—
Equipment acquired under capital leases	$	937	$	1,153	$	1,470
Unsettled repurchases of common stock	$	898	$	935	$	1,012
Employee stock purchase plan	$	522	$	669	$	578
Shares tendered in payment of exercise price of stock options	$	—	$	63	$	—