CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net loss		$ (2,444)	$ (12,048)
Non-cash items included in net loss:
Depreciation and amortization		20,602	25,327
Impairment loss		32,311
Drydock amortization		3,940	5,272
Stock-based compensation charges		1,484	4,278
Loss from investments in unconsolidated affiliates		4,478	6,741
Restructuring expense			4,169
Deferred income taxes		5,164	(5,341)
Other non-cash items		(2,698)	(1,839)
Changes in assets and liabilities that provided (used) cash:
Accounts receivable		(61,248)	(69,214)
Contracts in progress net of advance billings on contracts		50,839	(61,021)
Accounts payable		16,762	110,785
Accrued and other current liabilities		(16,112)	(5,723)
Pension liability		(375)	(555)
Other assets and liabilities		6,577	(19,370)
Total cash provided by (used in) operating activities		59,280	(18,539)
Cash flows from investing activities:
Purchases of property, plant and equipment	[1]	(31,900)	(23,972)
(Increase) decrease in restricted cash and cash equivalents		15,075	(12,179)
Sales and maturities of available-for-sale securities			1,775
Investments in unconsolidated affiliates		(4,105)	(4,696)
Other investing activities			76
Total cash used in investing activities		(20,930)	(38,996)
Cash flows from financing activities:
Repayment of debt		(4,752)	(4,706)
Repurchase of common stock		(2,200)	(1,003)
Other			(320)
Total cash used in financing activities		(6,952)	(6,029)
Effects of exchange rate changes on cash and cash equivalents		(139)	(1,109)
Net increase (decrease) in cash and cash equivalents		31,259	(64,673)
Cash and cash equivalents at beginning of period		664,844	665,309
Cash and cash equivalents at end of period		$ 696,103	$ 600,636

[1] Total capital expenditures represent expenditures for which cash payments were made during the period. Capital expenditures for the three months ended March 31, 2016 exclude $2 million in accrued liabilities related to capital expenditures as of December 31, 2015. Capital expenditures for the three months ended March 31, 2015 include $3 million of cash payments for accrued capital expenditures outstanding as of December 31, 2014.