CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating activities:
Net loss	$ (43,613)	$ (78,729)	$ (47,235)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Deferred income tax provision (benefit)	516	(8,670)	39,682
Depreciation and amortization on plant, property and equipment and intangible assets	9,417	11,072	9,935
Amortization on deferred financing costs	231	253	229
Impairment expense		47,755
Loss on disposals of property, plant and equipment	2,446	19	752
Loss on sale of business and net assets held for sale	8,812
Bad debt expense	530	865	364
Gain on bargain purchase		(3,168)
Stock-based compensation	2,434	3,744	3,081
Changes in operating assets and liabilities, net of businesses acquired and sold:
(Increase) decrease in accounts receivable	27,510	20,132	(23,764)
(Increase) decrease in inventories	1,878	467	(1,428)
(Increase) decrease in costs and estimated earnings in excess of billings	(9,110)	8,050	(6,331)
(Increase) decrease in other current assets	(3,636)	2,600	699
(Increase) decrease in other assets	537	(950)	(608)
(Decrease) increase in accounts payable	2,849	2,029	(6,864)
Increase (decrease) in accrued and other liabilities	1,014	1,225	21,362
Decrease in accrued warranties	(2,226)	1,573	2,739
Increase (decrease) in billings in excess of costs and estimated earnings	(3,212)	(1,486)	(3,181)
Net cash (used in) provided by operating activities	(3,623)	6,781	(10,568)
Investing activities:
Acquisitions, net of cash acquired		(7,629)	(725)
Proceeds from sale of business, net of restricted cash and transaction costs	4,847
Net transfers of restricted cash	(8,444)	(321)	120
Proceeds from sale of property, plant and equipment	13,978	7	171
Purchase of property, plant and equipment	(872)	(7,316)	(8,087)
Net cash provided by (used in) investing activities	9,509	(15,259)	(8,521)
Financing activities:
Repurchase of stock-based awards for payment of statutory taxes due on stock-based compensation	(267)	(429)	(601)
Debt issuance costs	(177)		8
Dividends paid		(1,589)	(6,141)
Proceeds from long-term debt	116,418	58,000	99,000
Payments of long-term debt	(141,076)	(33,000)	(77,000)
Net cash provided by (used in) financing activities	(25,102)	22,982	15,266
Effect of exchange rate changes on cash	(218)	(1,181)	(1,200)
Net change in cash and cash equivalents	(19,434)	13,323	(5,023)
Cash and cash equivalents, beginning of year	22,239	8,916	13,939
Cash and cash equivalents, end of year	2,805	22,239	8,916
Supplemental Disclosures:
Cash paid for interest	6,242	3,486	1,170
Cash paid for income taxes, net of refunds	$ 1,612	$ 643	$ (195)