Consolidated Statement of Cash Flows Statement - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash Flows from Operating Activities:
Net Income	$ 21,840	$ 18,780
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on dispositions of assets	(3,030)	(1,120)
Depreciation	13,050	11,980
Amortization of intangible assets	9,990	10,190
Amortization of debt issue costs	690	670
Deferred income taxes	2,060	230
Non-cash compensation expense	3,340	4,140
Tax effect from stock based compensation	0	(170)
Increase in receivables	(11,490)	(3,660)
Decrease in inventories	2,850	1,130
Decrease in prepaid expenses and other assets	6,280	10,650
Decrease in accounts payable and accrued liabilities	(1,930)	(21,710)
Other operating activities	(120)	(410)
Net cash provided by operating activities	49,590	32,940
Cash Flows from Investing Activities:
Capital expenditures	(16,910)	(12,960)
Net proceeds from disposition of property and equipment	1,780	120
Net cash used for investing activities	(15,130)	(12,840)
Cash Flows from Financing Activities:
Repayments of borrowings on term loan facilities	(6,910)	(6,950)
Proceeds from borrowings on revolving credit and accounts receivable facilities	300,050	216,580
Repayments of borrowings on revolving credit and accounts receivable facilities	(324,900)	(225,050)
Shares surrendered upon options and restricted stock vesting to cover taxes	(480)	(650)
Other financing activities	(250)	180
Net cash used for financing activities	(32,490)	(15,890)
Net increase for the period	1,970	4,210
At beginning of period	20,710	19,450
At end of period	22,680	23,660
Supplemental disclosure of cash flow information:
Cash paid for interest	6,060	5,860
Cash paid for taxes	$ 10,600	$ 3,170