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Revenue Recognition (Schedule of Consolidated Statement of Cash Flows) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Operating Activities |  |  |
Net income | $ 83,019 | $ 32,585 | $ 52,812
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 68,800 | 61,517 | 58,106
Amortization | 10,236 | 10,439 | 9,355
Change in other noncurrent liabilities | (5,479) | (10,145) | (5,232)
Change in deferred taxes and other liabilities | 8,972 | (1,264) | 5,889
Provision for write-off of property, plant and equipment | 3,707 | 2,870 | 2,778
Non-cash interest expense | 459 | 660 | 564
Write-off of pension liability adjustment due to settlement/curtailment | 1,494 |  | 51
Compensation and benefits paid or payable in Class A Common Stock | 2,203 | 2,133 | 2,433
Changes in operating assets and liabilities that provided/(used) cash, net of impact of business acquisition: |  |  |
Accounts receivable | (19,139) | (21,859) | (12,697)
Contract assets | (10,267) |  |
Inventories | (968) | 3,090 | (12,520)
Prepaid expenses and other current assets | (5,815) | (4,989) | (2,595)
Income taxes prepaid and receivable | (1,402) | (941) | (2,206)
Noncurrent receivables | (12,249) | (18,766) | (14,045)
Accounts payable | 9,340 | 2,910 | 2,108
Accrued liabilities | 8,209 | 5,303 | 1,312
Income taxes payable | (824) | (799) | 1,398
Other, net | (7,811) | (2,677) | (6,571)
Net cash provided by operating activities | 132,485 | 64,216 | 80,940
Net cash used in investing activities | (82,886) | (87,637) | (253,553)
Net cash (used in)/provided by financing activities | (27,258) | 12,867 | 172,038
Effect of exchange rate changes on cash and cash equivalents | (8,313) | 12,539 | (2,796)
Increase/(decrease) in cash and cash equivalents | 14,028 | 1,985 | (3,371)
Cash and cash equivalents at beginning of year | 183,727 | 181,742 | 185,113
Cash and cash equivalents at end of year | 197,755 | 183,727 | $ 181,742
As reported [Member] |  |  |
Operating Activities |  |  |
Net income | 83,019 |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 68,800 |  |
Amortization | 10,236 |  |
Change in other noncurrent liabilities | (5,479) |  |
Change in deferred taxes and other liabilities | 8,972 |  |
Provision for write-off of property, plant and equipment | 3,707 |  |
Non-cash interest expense | 459 |  |
Write-off of pension liability adjustment due to settlement/curtailment | 1,494 |  |
Compensation and benefits paid or payable in Class A Common Stock | 2,203 |  |
Changes in operating assets and liabilities that provided/(used) cash, net of impact of business acquisition: |  |  |
Accounts receivable | (19,139) |  |
Contract assets | (10,267) |  |
Inventories | (968) |  |
Prepaid expenses and other current assets | (5,815) |  |
Income taxes prepaid and receivable | (1,402) |  |
Noncurrent receivables | (12,249) |  |
Accounts payable | 9,340 |  |
Accrued liabilities | 8,209 |  |
Income taxes payable | (824) |  |
Other, net | (7,811) |  |
Net cash provided by operating activities | 132,485 |  |
Net cash used in investing activities | (82,886) |  |
Net cash (used in)/provided by financing activities | (27,258) |  |
Effect of exchange rate changes on cash and cash equivalents | (8,313) |  |
Increase/(decrease) in cash and cash equivalents | 14,028 |  |
Cash and cash equivalents at beginning of year | 183,727 |  |
Cash and cash equivalents at end of year | 197,755 | 183,727 |
Adjustments to reverse effects of ASC 606 [Member] |  |  |
Operating Activities |  |  |
Net income | (2,448) |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation |  |  |
Amortization |  |  |
Change in other noncurrent liabilities |  |  |
Change in deferred taxes and other liabilities | (877) |  |
Provision for write-off of property, plant and equipment |  |  |
Non-cash interest expense |  |  |
Write-off of pension liability adjustment due to settlement/curtailment |  |  |
Compensation and benefits paid or payable in Class A Common Stock |  |  |
Changes in operating assets and liabilities that provided/(used) cash, net of impact of business acquisition: |  |  |
Accounts receivable | (17,387) |  |
Contract assets | 10,267 |  |
Inventories | 10,433 |  |
Prepaid expenses and other current assets |  |  |
Income taxes prepaid and receivable |  |  |
Noncurrent receivables |  |  |
Accounts payable |  |  |
Accrued liabilities | 12 |  |
Income taxes payable |  |  |
Other, net |  |  |
Net cash provided by operating activities |  |  |
Net cash used in investing activities |  |  |
Net cash (used in)/provided by financing activities |  |  |
Effect of exchange rate changes on cash and cash equivalents |  |  |
Increase/(decrease) in cash and cash equivalents |  |  |
Cash and cash equivalents at beginning of year |  |  |
Cash and cash equivalents at end of year |  |  |
As adjusted to exclude adoption of ASC 606 [Member] |  |  |
Operating Activities |  |  |
Net income | 80,571 |  |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Depreciation | 68,800 |  |
Amortization | 10,236 |  |
Change in other noncurrent liabilities | (5,479) |  |
Change in deferred taxes and other liabilities | 8,095 |  |
Provision for write-off of property, plant and equipment | 3,707 |  |
Non-cash interest expense | 459 |  |
Write-off of pension liability adjustment due to settlement/curtailment | 1,494 |  |
Compensation and benefits paid or payable in Class A Common Stock | 2,203 |  |
Changes in operating assets and liabilities that provided/(used) cash, net of impact of business acquisition: |  |  |
Accounts receivable | (36,526) |  |
Contract assets |  |  |
Inventories | 9,465 |  |
Prepaid expenses and other current assets | (5,815) |  |
Income taxes prepaid and receivable | (1,402) |  |
Noncurrent receivables | (12,249) |  |
Accounts payable | 9,340 |  |
Accrued liabilities | 8,221 |  |
Income taxes payable | (824) |  |
Other, net | (7,811) |  |
Net cash provided by operating activities | 132,485 |  |
Net cash used in investing activities | (82,886) |  |
Net cash (used in)/provided by financing activities | (27,258) |  |
Effect of exchange rate changes on cash and cash equivalents | (8,313) |  |
Increase/(decrease) in cash and cash equivalents | 14,028 |  |
Cash and cash equivalents at beginning of year | 183,727 |  |
Cash and cash equivalents at end of year | $ 197,755 | $ 183,727 |

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- Definition The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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