CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash provided (required) by operating activities:
Net income	$ 52,960	$ 93,191	$ 110,519
Adjustments to reconcile net income (loss) to net cash provided (required) by operating activities:
Depreciation	68,557	72,569	59,161
Amortization	51,381	51,892	53,701
Stock-based compensation	10,250	5,375	2,236
Loss (gain) on sale of fixed assets and business, net	429	(1,173)	(934)
Impairment of long-lived assets	1,874	990	3,581
Provision for doubtful accounts	4,955	2,007	954
Amortization of deferred loan costs and accretion of discount	2,590	1,671	0
Deferred income taxes	(13,874)	1,492	(73,501)
Employee benefit plan expense	1,883	3,340	1,064
Other	3,464	1,885	(6,142)
Changes in operating assets and liabilities (net of effects of acquisitions and foreign exchange):
Receivables	25,948	(55,378)	(61,573)
Inventories	19,065	(40,018)	(13,808)
Prepaid expenses and other current assets	(10,742)	(3,750)	(5,116)
Accounts payable	(20,526)	40,393	31,827
Accrued compensation and employee benefits	(6,358)	8,454	5,616
Accrued expenses and other liabilities	4,406	12,095	(165)
Leased assets	(40,700)	(25,867)	(27,788)
Other	337	(5,268)	(3,582)
Net cash provided by operating activities	155,899	163,900	76,050
Cash provided (required) by investing activities:
Capital expenditures	(39,780)	(57,918)	(36,654)
Proceeds from sale of fixed assets	4,598	1,187	3,547
Proceeds from (payment on) sale of businesses	(2,194)
Proceeds from (payment on) sale of businesses		2,473	0
Acquisition (net of cash and cash equivalents acquired)	(12,500)	0	(8,842)
Purchase price adjustments on acquisition	0	53	0
Net cash required by investing activities	(49,876)	(54,205)	(41,949)
Cash provided (required) by financing activities:
Proceeds from long-term debt, net of discounts	36,500	713,963	0
Payment of debt issue costs	0	(16,006)	0
Repayment of long-term debt	(141,500)	(45,000)	(599)
Distributions to Dover Corporation, net	0	(736,557)	(31,192)
Distribution to noncontrolling interest	0	(2,720)	(1,212)
Payment of capital lease obligations	(5,555)	(4,518)	(3,690)
Payments related to taxes withheld on stock-based compensation	(1,848)	0	0
Net cash required by financing activities	(112,403)	(90,838)	(36,693)
Effect of exchange rate changes on cash and cash equivalents	(162)	(737)	277
Net increase (decrease) in cash and cash equivalents	(6,542)	18,120	(2,315)
Cash and cash equivalents at beginning of period	41,832	23,712	26,027
Cash and cash equivalents at end of period	$ 35,290	$ 41,832	$ 23,712