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Fair Values of Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2016
Fair Value Disclosures [Abstract] |
Estimated Fair Value of Outstanding Debt Balances | The estimated fair value of the Company’s outstanding debt balances (including current portion) as of March 31, 2016 and December 31, 2015 is set forth below (in thousands):
| March 31, 2016 |  |  | December 31, 2015 |
| Carrying |  |  | Fair |  |  | Carrying |  |  | Fair |
| Value |  |  | Value |  |  | Value |  |  | Value |
Borrowings under Credit Agreement: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term loan facility | $ | 65,000 |  |  | $ | 65,000 |  |  | $ | 70,000 |  |  | $ | 70,000 |
2015 Term Loan |  | 180,000 |  |  |  | 180,000 |  |  |  | 185,000 |  |  |  | 185,000 |
4.97% Series A Senior Notes |  | 300,000 |  |  |  | 286,836 |  |  |  | 300,000 |  |  |  | 279,635 |
4.27% Series B Senior Notes |  | 300,000 |  |  |  | 268,149 |  |  |  | 300,000 |  |  |  | 258,806 |
Total debt | $ | 845,000 |  |  | $ | 799,985 |  |  | $ | 855,000 |  |  | $ | 793,441 |

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13476-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13467-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6447952&loc=d3e13220-108610 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13433-108611 + Details
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