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Debt (Tables) | 6 Months Ended
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Jun. 30, 2017
Debt Instruments [Abstract] |
Schedule of Debt | Debt consists of the following (in thousands):
| June 30, 2017 |  | December 31, 2016
Convertible senior notes - unsecured (net of discount of $4,098 and $4,717) | $ | 193,477 |  |  | $ | 195,283 |
Revolving credit facility - unsecured | 188,000 |  |  | 158,000 |
Bank term loans - unsecured | 250,000 |  |  | 250,000 |
Private placement term loans - unsecured | 400,000 |  |  | 400,000 |
HUD mortgage loans (net of discount of $1,444 and $1,487) | 44,003 |  |  | 44,354 |
Fannie Mae term loans - secured, non-recourse | 78,084 |  |  | 78,084 |
Unamortized loan costs | (8,559 | ) |  | (9,740 | )
| $ | 1,145,005 |  |  | $ | 1,115,981 |
Schedule of Maturities of Long-term Debt | Aggregate principal maturities of debt as of June 30, 2017 for each of the next five years and thereafter, after giving effect to the modifications to our credit facility discussed below, are as follows (in thousands):
Twelve months ended June 30, |
2018 | $ | 808 |
2019 | 835 |
2020 | 438,863 |
2021 | 198,468 |
2022 | 923 |
Thereafter | 519,209 |
| 1,159,106 |
Less: discount | (5,542 | )
Less: unamortized loan costs | (8,559 | )
| $ | 1,145,005 |
Schedule of Unsecured Term Loans | Our unsecured private placement term loans are summarized below:
Amount |  | Inception |  | Maturity |  | Fixed Rate
$ | 125,000,000 |  |  | January 2015 |  | January 2023 |  | 3.99%
50,000,000 |  |  | November 2015 |  | November 2023 |  | 3.99%
75,000,000 |  |  | September 2016 |  | September 2024 |  | 3.93%
50,000,000 |  |  | November 2015 |  | November 2025 |  | 4.33%
100,000,000 |  |  | January 2015 |  | January 2027 |  | 4.51%
$ | 400,000,000 |  |  |  |  |  |  |
Schedule of Interest Expense | The following table summarizes interest expense (in thousands):
| Three Months Ended |  | Six Months Ended
| June 30, |  | June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Interest expense at contractual rates | $ | 10,957 |  |  | $ | 9,991 |  |  | $ | 21,779 |  |  | $ | 19,505 |
Capitalized interest | (94 | ) |  | (196 | ) |  | (160 | ) |  | (316 | )
Loss on conversion retirement | 96 |  |  | — |  |  | 96 |  |  | — |
Amortization of debt issuance costs and debt discount | 869 |  |  | 871 |  |  | 1,774 |  |  | 1,739 |
Total interest expense | $ | 11,828 |  |  | $ | 10,666 |  |  | $ | 23,489 |  |  | $ | 20,928 |
Schedule of Interest Rate Derivatives | June 30, 2017 (dollars in thousands):
Date Entered |  | Maturity Date |  | Fixed Rate |  | Rate Index |  | Notional Amount |  | Fair Value
May 2012 |  | April 2019 |  | 3.29% |  | 1-month LIBOR |  | $ | 40,000 |  |  | $ | (33 | )
June 2013 |  | June 2020 |  | 3.86% |  | 1-month LIBOR |  | $ | 80,000 |  |  | $ | (1,083 | )
March 2014 |  | June 2020 |  | 3.91% |  | 1-month LIBOR |  | $ | 130,000 |  |  | $ | (1,941 | )

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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 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 2: 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=84159872&loc=d3e21475-112644 Reference 3: 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=75038535&loc=d3e64711-112823 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=26873400&loc=d3e23780-122690 Reference 5: 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=64930739&loc=d3e28878-108400 Reference 6: 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=84159872&loc=d3e21538-112644 Reference 7: 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=84159872&loc=d3e21506-112644 Reference 8: 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=64930785&loc=d3e28541-108399 Reference 9: 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=64930785&loc=d3e28551-108399 Reference 10: 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=84159872&loc=d3e21521-112644 + Details
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