CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income		$ 35,753	$ 9,176
Non-cash items included in net income:
Depreciation and amortization		66,892	75,982
Drydock amortization		9,863	13,910
Impairment loss		44,069	6,808
Stock-based compensation charges		14,011	12,991
Loss from investments in unconsolidated affiliates		2,844	18,748
Loss (gain) on asset disposals		(950)	1,443
Restructuring (gain) expense		(1,500)	11,954
Deferred income taxes		11,889	2,315
Other non-cash items		(1,657)	3,164
Changes in operating assets and liabilities that provided (used) cash:
Accounts receivable		(29,661)	11,294
Contracts in progress, net of Advance billings on contracts		53,608	(260,317)
Accounts payable		(110,196)	98,552
Accrued and other current liabilities		(13,426)	(7,269)
Pension liability		(1,209)	(1,319)
Income taxes		10,453	(10,360)
Other assets and liabilities, net		34,816	7,582
Total cash provided by (used in) operating activities		125,599	(5,346)
Cash flows from investing activities:
Purchases of property, plant and equipment	[1]	(197,393)	(66,118)
Decrease in restricted cash and cash equivalents		17,169	51,769
Investments in unconsolidated affiliates		(4,105)	(6,960)
Proceeds from asset dispositions		1,123	10,669
Sales and maturities of available-for-sale securities			3,175
Other, net			417
Total cash used in investing activities		(183,206)	(7,048)
Cash flows from financing activities:
Repayment of debt		(93,755)	(18,004)
Repurchase of common stock		(3,909)
Payment of debt issuance costs		(8,256)
Distribution to noncontrolling interest			(24)
Other, net			(928)
Total cash used in financing activities		(105,920)	(18,956)
Effects of exchange rate changes on cash and cash equivalents		(861)	(2,574)
Net decrease in cash and cash equivalents		(164,388)	(33,924)
Cash and cash equivalents at beginning of period		664,844	665,309
Cash and cash equivalents at end of period		$ 500,456	$ 631,385

[1] Total capital expenditures represent expenditures for which cash payments were made during the period. Capital expenditures for the three and nine months ended September 30, 2016 included $2 million and $0.1 million of cash payments for liabilities outstanding at the beginning of the respective periods. Capital expenditures for the three and nine months ended September 30, 2015 included $1 million and $10 million, respectively, of cash payments for accrued capital expenditures outstanding at the beginning of the respective periods.