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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Cash flows from operating activities |  |
Net income | $ 21,272 | $ 20,173
Adjustments to reconcile net income to net cash provided by operating activities |  |
Depreciation | 5,163 | 4,202
Amortization of intangibles | 4,941 | 4,501
Net gain on sale of property, plant and equipment | (6,013) | (2,456)
Loss on debt extinguishment | 174 | 640
Deferred income taxes | (23) | (13)
Stock-based compensation | 2,657 | 2,963
Non-cash interest expense | 675 | 520
Changes in operating assets and liabilities |  |
Accounts receivable | (45,910) | 36,353
Inventories | (58,393) | (51,692)
Prepaid expenses and other | 591 | 8,286
Accounts payable and accrued liabilities | 63,943 | 41,395
Other, net | (1,120) | 428
Net cash (used in) provided by operating activities | (12,043) | 65,300
Cash flows from investing activities |  |
Capital expenditures | (6,060) | (3,173)
Proceeds from the sale of property, plant, and equipment | 9,523 | 3,761
Other, net | 3,060 | 1,218
Net cash provided by investing activities | 6,523 | 1,806
Cash flows from financing activities |  |
Proceeds from exercise of stock options | 861 | 5,408
Dividends paid | (4,692) | (3,893)
Borrowings under revolving credit facilities | 254 | 152
Payments under revolving credit facilities | (254) | (152)
Principal payments under capital lease obligations | (71) | (171)
Proceeds from issuance of term loan credit facility | 0 | 189,470
Principal payments under term loan credit facility | (471) | (189,944)
Principal payments under industrial revenue bond | (92) | (177)
Debt issuance costs paid | 0 | (354)
Convertible senior notes repurchase | (17,183) | 0
Stock repurchase | (5,412) | (16,625)
Net cash used in financing activities | (27,060) | (16,286)
Net (decrease) increase in cash, cash equivalents, and restricted cash | (32,580) | 50,820
Cash, cash equivalents and restricted cash at beginning of period | 191,521 | 163,467
Cash, cash equivalents, and restricted cash at end of period | $ 158,941 | $ 214,287

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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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Period Type: | duration

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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