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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2018 | Sep. 30, 2017
Cash flows from operating activities: |  |
Net earnings | $ 16,684 | $ 8,890
Adjustments to reconcile net earnings to net cash provided by operating activities: |  |
Depreciation and amortization | 13,738 | 15,712
Stock-based compensation | 2,046 | 2,310
Amortization of deferred financing costs | 413 | 993
Deferred income taxes | 1,740 | (3,072)
Net unrealized (gains) losses on foreign currency revaluation | (2,396) | 2,679
Other, net | 963 | 1,548
Changes in operating assets and liabilities: |  |
Accounts receivable, net | (18,985) | (7,913)
Unbilled receivables | (2,017) | 0
Inventories | (18,844) | (3,306)
Account payable | 15,545 | (3,563)
Accrued expenses | 1,969 | (2,031)
Other operating assets/liabilities, net | (6,687) | 1,949
Net cash provided by operating activities | 4,169 | 14,196
Cash flows from investing activities: |  |
Purchases of property, plant and equipment | (8,770) | (3,756)
Proceeds from disposal/sale of property, plant and equipment | 53 | 10
Proceeds from sale of marketable securities within rabbi trust | 1,348 | 0
Purchase of marketable securities within rabbi trust | (1,348) | 0
Net cash used in investing activities | (8,717) | (3,746)
Cash flows from financing activities: |  |
Repayments of long-term debt | (8,268) | (25,208)
Dividends paid to common stockholders | (2,376) | (2,347)
Borrowings under revolving credit line | 7,500 | 6,000
Repayments of revolving credit line | (7,500) | (2,000)
Reduction in notes payable | 0 | (55)
Net cash used in financing activities | (10,644) | (23,610)
Effect of exchange rate changes on cash and cash equivalents | 134 | 1,855
Net decrease in cash and cash equivalents | (15,058) | (11,305)
Cash and cash equivalents - beginning of period | 69,354 | 73,411
Cash and cash equivalents - end of period | 54,296 | 62,106
Cash paid during the period for: |  |
Income tax payments, net of refunds received | 6,291 | 1,688
Interest payments | $ 3,485 | $ 3,471

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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + 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 (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration