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Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2016
Accounting Policies [Abstract] |
Schedule of Foreign Currency Transaction Gains and Losses | The following table summarizes foreign currency transaction gains and losses recognized in the income statement:
(in thousands) |  | 2016 |  | 2015 |  | 2014
(Gains)/losses included in: |  |  |  |  |  |  |  |  |
Selling, general, and administrative expenses |  | ($381 | ) |  | (5,090 | ) |  | ($3,931 | )
Other (income)/expense, net |  | (3,532 | ) |  | 1,496 |  |  | (6,379 | )
Total transaction (gains)/losses |  | ($3,913 | ) |  | ($3,594 | ) |  | ($10,310 | )
Schedule of foreign currency gains and losses on long-term intercompany loans | The following table presents foreign currency gains and losses on long-term intercompany loans that were recognized in Other comprehensive income:
(in thousands) |  | 2016 |  | 2015 |  | 2014
Gain/(loss) on long-term intercompany loans |  | $3,515 |  |  | ($5,225 | ) |  | $5,317
Schedule of Accounts Receivable | As of December 31, 2016 and 2015, Accounts receivable consisted of the following:
(in thousands) | 2016 | 2015
Trade and other accounts receivable | $146,460 | $123,179
Bank promissory notes | 15,759 | 15,845
Revenue in excess of progress billings | 15,926 | 15,889
Allowance for doubtful accounts | (6,952) | (8,530)
Total accounts receivable | $171,193 | $146,383
Schedule of Inventories | As of December 31, 2016 and 2015, inventories consisted of the following:
(in thousands) |  | 2016 |  | 2015
Raw materials |  | $37,691 |  |  | $27,636 |
Work in process |  | 58,715 |  |  | 41,823 |
Finished goods |  | 37,500 |  |  | 36,947 |
Total inventories |  | $133,906 |  |  | $106,406

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