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Credit Risk and Fair Value of Financial Instruments Level 3 (Tables) | 12 Months Ended
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Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Fair Value, Measurement Inputs, Disclosure [Table Text Block] | The fair value of our debt instruments at December 31 was as follows:
| 2014 |  | 2013
| (In thousands)
3.125% Senior Convertible Notes due July 2014 | — |  |  | 106,939 |
6.75% Senior Notes due April 2015 | — |  |  | 144,653 |
6.75% Senior Notes due April 2016 | 208,075 |  |  | 214,904 |
3.125% Senior Convertible Notes due July 2016 | 160 |  |  | 60,487 |
7.0% Senior Notes due June 2017 | 320,043 |  |  | 333,259 |
7.625% Senior Notes due October 2018 | 277,538 |  |  | 288,875 |
6.5% Senior Notes due April 2019 | — |  |  | 210,000 |
7.0% Senior Notes due May 2019 | — |  |  | 270,000 |
4.5% Senior Notes due November 2020 | 201,700 |  |  | 192,610 |
8.0% Senior Notes due November 2021 | 174,375 |  |  | 173,625 |
5.375% Senior Notes due January 2022 | 437,750 |  |  | 431,588 |
5.375% Senior Notes due May 2024 | 558,250 |  |  | — |
7.5% Senior Notes due April 2027 | 220,890 |  |  | 215,750 |
Term Loan due July 2018 | 370,000 |  |  | 600,000 |
Bank credit facility due July 2018 | 235,000 |  |  | 30,000 |
Mortgage notes and other debt, maturities through 2047 | 4,117 |  |  | 4,752 |
Total fair value of debt instruments | $ | 3,007,898 |  |  | $ | 3,277,442 |

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- Definition The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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