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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017
Cash flows from operating activities |  |
Net income | $ 53,174 | $ 43,118
Adjustments to reconcile net income to net cash provided by operating activities |  |
Depreciation | 10,330 | 8,412
Amortization of intangibles | 9,881 | 8,597
Net gain on sale of property, plant and equipment | (9,743) | (2,502)
Loss on debt extinguishment | 174 | 764
Deferred income taxes | (81) | 45
Stock-based compensation | 5,390 | 5,430
Non-cash interest expense | 1,110 | 1,042
Changes in operating assets and liabilities |  |
Accounts receivable | (46,564) | 30,656
Inventories | (56,057) | (60,748)
Prepaid expenses and other | 1,756 | 3,998
Accounts payable and accrued liabilities | 72,792 | 35,285
Other, net | (1,691) | 1,147
Net cash provided by operating activities | 40,471 | 75,244
Cash flows from investing activities |  |
Capital expenditures | (11,117) | (10,856)
Proceeds from the sale of property, plant, and equipment | 16,426 | 3,736
Other, net | 3,060 | 1,220
Net cash provided by (used in) investing activities | 8,369 | (5,900)
Cash flows from financing activities |  |
Proceeds from exercise of stock options | 910 | 5,630
Dividends paid | (9,271) | (7,767)
Borrowings under revolving credit facilities | 423 | 371
Payments under revolving credit facilities | (423) | (371)
Principal payments under capital lease obligations | (143) | (303)
Proceeds from issuance of term loan credit facility | 0 | 189,470
Principal payments under term loan credit facility | (940) | (190,418)
Principal payments under industrial revenue bond | (92) | (311)
Debt issuance costs paid | 0 | (354)
Convertible senior notes repurchase | (80,200) | (7,331)
Stock repurchase | (21,413) | (42,794)
Net cash used in financing activities | (111,149) | (54,178)
Net (decrease) increase in cash, cash equivalents, and restricted cash | (62,309) | 15,166
Cash, cash equivalents and restricted cash at beginning of period | 191,521 | 163,467
Cash, cash equivalents, and restricted cash at end of period | $ 129,212 | $ 178,633

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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109197908&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements. + 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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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- Definition The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, 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 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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