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Supplemental Cash Flows | 12 Months Ended
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Dec. 31, 2014
Supplemental Cash Flow Information [Abstract] |
Cash Flow, Supplemental Disclosures [Text Block] | ## 13. Supplemental Cash Flows Supplemental disclosures of cash flow information are as follows for the years ended December 31:
(in thousands) |  | 2014 |  | 2013 |  | 2012
Cash paid during the period for: |  |  |  |  |  |  |  |  |  |  |  |
Income taxes |  | $ | 17,403 |  |  | $ | 18,115 |  |  | $ | 16,926 |
Interest expense |  |  | 577 |  |  |  | 571 |  |  |  | 670 |
Noncash investing activities: |  |  |  |  |  |  |  |  |  |  |  |
Acquisition of property and equipment for which payment is pending |  |  | 749 |  |  |  | 804 |  |  |  | 390 |

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- Definition The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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