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Supplemental Cash Flow Disclosures (Tables) | 12 Months Ended
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Dec. 31, 2018
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Cash Paid for Interest and Income Taxes | Cash paid for interest and income taxes during the years ended December 31, 2018, 2017 and 2016 were as follows:
| For the Year Ended December 31,
| 2018 |  | 2017 |  | 2016
(in thousands) |  |  |  |  |
Cash paid for interest | $ | 16,741 |  |  | $ | 12,420 |  |  | $ | 10,315 |
Cash paid for income taxes, net of refunds | $ | 477 |  |  | $ | (4,114 | ) |  | $ | (5,308 | )
Non-Cash Investing and Financing Activities | Non-cash investing and financing activities during the years ended December 31, 2018, 2017, and 2016 were as follows:
| For the Year Ended December 31,
| 2018 |  | 2017 |  | 2016
(in thousands) |  |  |  |  |
Capital property and equipment acquired on account, but not paid for as of December 31 | $ | 39,402 |  |  | $ | 15,457 |  |  | $ | 9,791 |
Common stock issued for the Retirement Savings Plan | $ | — |  |  | $ | — |  |  | $ | 777 |
Common stock issued under the SICP | $ | 2,006 |  |  | $ | 1,127 |  |  | $ | 1,027 |
Capital lease obligation | $ | 1,310 |  |  | $ | 2,070 |  |  | $ | 3,471 |

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- Definition Tabular disclosure of acquisition of assets or a business through noncash (or part noncash) transactions. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Disclosure may include the equity interest acquired, value of assets acquired, value of liabilities acquired, net monetary assets acquired, number of shares, warrants or options issued as consideration for a business or asset acquired and other information necessary to a fair presentation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586 + Details
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