Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 5,722	$ 19,931
Adjustments to reconcile to net cash provided by (used in) operating activities:
Depreciation and amortization	18,777	23,964
Gain on sale of fixed assets	(239)	(223)
Equity-based compensation expense	5,094	6,736
Deferred income taxes	395	5,353
Non-cash restructuring charges	2,980	102
Loss on foreign currency transactions	824	862
Other	477	(1,150)
Changes in operating assets and liabilities (net of acquisitions):
Receivables net, retainage and contract assets	(6,007)	(36,862)
Inventories	(3,882)	(4,855)
Prepaid expenses and other assets	7,779	19,062
Accounts payable and accrued expenses	(9,960)	(3,210)
Contract liabilities	(12,616)	(30,503)
Other operating	853	310
Net cash provided by (used in) operating activities	10,197	(483)
Cash flows from investing activities:
Capital expenditures	(13,616)	(12,829)
Proceeds from sale of fixed assets	595	430
Patent expenditures	(209)	(246)
Other acquisition activity	(3,000)	(9,045)
Net cash used in investing activities	(16,230)	(21,690)
Cash flows from financing activities:
Repurchase of common stock	(18,609)	(21,034)
Distributions to non-controlling interests	0	(35)
Payment of contingent consideration	0	(500)
Credit facility amendment fees	(1,093)	0
Principal payments on notes payable	(22)	0
Proceeds from line of credit, net	9,000	17,000
Principal payments on long-term debt	(13,125)	(8,750)
Net cash used in financing activities	(23,849)	(13,319)
Effect of exchange rate changes on cash	(830)	8,056
Net decrease in cash, cash equivalents and restricted cash for the period	(30,712)	(27,436)
Cash, cash equivalents and restricted cash, beginning of year	108,545	134,392
Cash, cash equivalents and restricted cash, end of period	77,833	106,956
Cash, cash equivalents and restricted cash associated with assets held for sale, end of period	1,641	0
Cash, cash equivalents and restricted cash, end of period	$ 76,192	$ 106,956

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