Assets And Liabilities Held For Sale - Summary of Assets and Liabilities Held-for-Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets held for sale:
Cash and cash equivalents		$ 1,000
Total current assets	$ 7,792	70,314
Liabilities held for sale:
Total current liabilities	5,260	20,900
Australia | Held-for-sale assets
Assets held for sale:
Cash and cash equivalents	0
Receivables	1,309
Retainage	15
Contract assets	1,777
Inventories	2,123
Prepaid expenses and other current assets	300
Total current assets	5,524
Property, plant & equipment, less accumulated depreciation	2,268
Identified intangible assets, less accumulated amortization	0
Total assets held for sale	7,792
Liabilities held for sale:
Accounts payable	1,331
Accrued expenses	3,891
Contract liabilities	38
Total current liabilities	5,260
Debt	0
Other liabilities	0
Total liabilities held for sale	$ 5,260
Bayou | Held-for-sale assets
Assets held for sale:
Cash and cash equivalents		989
Receivables		6,368
Retainage		0
Contract assets		1,299
Inventories		3,727
Prepaid expenses and other current assets		827
Total current assets		13,210
Property, plant & equipment, less accumulated depreciation		53,887
Identified intangible assets, less accumulated amortization		3,217
Total assets held for sale		70,314
Liabilities held for sale:
Accounts payable		5,763
Accrued expenses		1,805
Contract liabilities		5,478
Total current liabilities		13,046
Debt		7,757
Other liabilities		97
Total liabilities held for sale		$ 20,900