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Debt and Financing Arrangements (Tables) | 6 Months Ended
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Jun. 30, 2017
Debt Disclosure [Abstract] |
Summary of Unsecured Credit Facility | Interest rates for the six months ended June 30, 2017 and 2016 were as follows:
|  | Six Months Ended |
|  | June 30, |
|  | 2017 |  |  | 2016 |
Weighted average rates |  |  | 2.60% |  |  |  | 2.38% |
Range of effective rates |  | 2.19% - 4.75% |  |  | 1.82% - 3.50% |
Summary of Recognized Interest Expense | During the three and six months ended June 30, 2017 and 2016, we recognized interest expense as follows (in thousands):
|  | Three Months Ended |  |  | Six Months Ended |
|  | June 30, |  |  | June 30, |
|  | 2017 |  |  | 2016 |  |  | 2017 |  |  | 2016 |
Credit facility (1) |  | $ | 1,692 |  |  | $ | 1,731 |  |  | $ | 3,209 |  |  | $ | 3,251 |
2006 Notes (2) |  |  | — |  |  |  | 2 |  |  |  | — |  |  |  | 8 |
Total interest expense |  | $ | 1,692 |  |  | $ | 1,733 |  |  | $ | 3,209 |  |  | $ | 3,259 |
| (1) | Components of interest expense related to the credit facility include amortization of deferred financing costs, commitment fees and line of credit fees.
| (2) | During the second quarter of 2016, we redeemed the remaining 3.125% Convertible Senior Subordinated Notes (the “2006 Notes”) for $750 thousand in cash plus accrued interest under an optional early redemption provision.

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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 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.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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