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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018
Cash Flows From Operating Activities: |  |
Net income | $ 8,915 | $ 8,429
Adjustments to reconcile net income to net cash provided by operating activities |  |
Depreciation and amortization | 7,327 | 5,622
Deferred income taxes | (491) | (282)
Stock compensation expense | 1,540 | 1,094
Debt issue cost amortization recorded in interest expense | 87 | 74
Other | (166) | 133
Changes in operating assets and liabilities, net of acquisition: |  |
Trade receivables | (8,692) | (7,639)
Inventories | 1,973 | (6,840)
Prepaid expenses and other assets | (289) | (504)
Accounts payable | (795) | 5,788
Accrued liabilities | (557) | 1,511
Net cash provided by operating activities | 8,852 | 7,386
Cash Flows From Investing Activities: |  |
Purchase of property and equipment | (6,401) | (5,555)
Cash paid for acquisitions |  | (13,312)
Net cash used in investing activities | (6,401) | (18,867)
Cash Flows From Financing Activities: |  |
Borrowings on long-term debt | 7,695 | 14,252
Principal payments of long-term debt | (7,000) | (2,500)
Dividends paid to stockholders | (605) | (522)
Stock transactions under employee benefit stock plans | (710) | 261
Net cash (used in) provided by financing activities | (620) | 11,491
Effect of foreign exchange rate changes on cash | (41) | (271)
Net increase (decrease) increase in cash and cash equivalents | 1,790 | (261)
Cash and cash equivalents at beginning of period | 8,673 | 15,590
Cash and cash equivalents at end of period | $ 10,463 | $ 15,329

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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 Reference 2: 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 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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