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Notes Payable (Tables) | 12 Months Ended
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Dec. 31, 2012
Notes Payable [Abstract] |
Schedule of Long-term Debt Instruments | Our unsecured notes outstanding as of December 31, 2012 were as follows (in thousands):
| Coupon/Stated Rate |  | Effective Rate (1) |  | Principal Amount |  | Maturity Date (2)
10 Year Unsecured Notes | 5.125 | % |  | 5.227 | % |  | $ | 60,000 |  |  | 3/15/2013
10 Year Unsecured Notes | 5.250 | % |  | 5.339 | % |  | 100,000 |  |  | 1/15/2014
10 Year Unsecured Notes | 5.350 | % |  | 5.359 | % |  | 50,000 |  |  | 5/1/2015
10 Year Unsecured Notes | 5.350 | % |  | 5.490 | % |  | 100,000 |  |  | 5/1/2015
10 Year Unsecured Notes | 4.950 | % |  | 5.053 | % |  | 250,000 |  |  | 10/1/2020
10 Year Unsecured Notes | 3.950 | % |  | 4.018 | % |  | 300,000 |  |  | 10/15/2022
30 Year Unsecured Notes | 7.250 | % |  | 7.360 | % |  | 50,000 |  |  | 2/25/2028
Total principal |  |  |  |  | 910,000 |  |  |
Net unamortized discount |  |  |  |  | (3,810 | ) |  |
Total |  |  |  |  | $ | 906,190 |  |  |
(1) Yield on issuance date, including the effects of discounts on the notes. (2) No principal amounts are due prior to maturity.
Schedule of Maturities of Long-term Debt | Scheduled principal payments subsequent to December 31, 2012 are as follows (in thousands):
2013 | $ | 33,313 |
2014 | 3,519 |
2015 | 22,174 |
2016 | 134,715 |
2017 | 104,712 |
Thereafter | 48,086 |
| 346,519 |
Net discounts/premiums | (3,549 | )
Total | $ | 342,970 |
The required principal payments excluding the effects of note discounts or premium for the remaining years subsequent to December 31, 2012 are as follows (in thousands):
2013 | $ | 60,000 |
2014 | 100,000 |
2015 | 150,000 |
2016 | — |
2017 | — |
Thereafter | 600,000 |
| $ | 910,000 |

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 Reference 4: 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=6881521&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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