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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
OPERATING ACTIVITIES    
Net income $ 2,486 $ 28,575
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 28,659 28,605
Asset Impairments Charges and Other PP&E Impairment 0 1,217
Interest accretion of convertible notes discount 10,027 9,268
Employee share-based compensation expense 9,555 9,014
Financing costs amortization 963 963
Unrealized foreign currency transaction loss 215 318
Other non-cash operating activities 975 (390)
Changes in assets and liabilities, net of acquisitions:    
Accounts receivable (10,311) 55,706
Inventory (19,264) 16,246
Unbilled contract revenues and other assets (8,431) 38,721
Accounts payable and other liabilities (4,824) (43,393)
Customer advances and billings in excess of contract revenue 7,487 1,742
Net Cash Provided By Operating Activities 17,537 146,592
INVESTING ACTIVITIES    
Capital expenditures (23,407) (13,411)
Proceeds from Sales of Assets, Investing Activities 925 0
Government grants 407 1,055
Acquisition of businesses, net of cash acquired (446,004) (1,383)
Net Cash Used In Investing Activities (468,079) (13,739)
FINANCING ACTIVITIES    
Borrowings on revolving credit facilities 302,176 3,820
Repayments on revolving credit facilities (5,097) (6,061)
Borrowings on term loan 0 13,167
Repayments on term loan 0 1,508
Proceeds from exercise of options 1,057 26
Excess tax benefits from share-based compensation 0 54
Common stock repurchases (1,954) (658)
Net Cash Provided By Financing Activities 296,182 8,840
Effect of exchange rate changes on cash 4,854 1,875
Net (decrease) increase in cash, cash equivalents, restricted cash, and restricted cash equivalents (149,506) 143,568
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents at Beginning of Period 282,949 123,708
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents at End of Period $ 133,443 [1] $ 267,276
[1] Refer to the Debt and Credit Arrangements and Business Combinations notes for further information regarding restricted cash and restricted cash equivalents balances.