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Fair Value Measurements (Details) - USD ($) | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Interest Rate Derivative Assets, at Fair Value |  | $ 31,000
Assets: |  |
Total | $ 4,463,000 | 4,397,000
Liabilities: |  |
Interest rate derivative financial instruments | 45,566,000 | 31,153,000
Total | 45,566,000 | 31,153,000
Level 1 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Interest Rate Derivative Assets, at Fair Value |  | 0
Assets: |  |
Total | 0 | 0
Liabilities: |  |
Interest rate derivative financial instruments | 0 | 0
Total | 0 | 0
Level 2 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Interest Rate Derivative Assets, at Fair Value |  | 31,000
Assets: |  |
Total | 4,463,000 | 4,397,000
Liabilities: |  |
Interest rate derivative financial instruments | 45,566,000 | 31,153,000
Total | 45,566,000 | 31,153,000
Investments [Member] |  |
Assets: |  |
Investments, Fair Value Disclosure | 4,332,000 | 4,235,000
Investments [Member] | Level 1 [Member] |  |
Assets: |  |
Investments, Fair Value Disclosure | 0 | 0
Investments [Member] | Level 2 [Member] |  |
Assets: |  |
Investments, Fair Value Disclosure | 4,332,000 | 4,235,000
Demand Obligation [Member] |  |
Assets: |  |
Investments, Fair Value Disclosure | 131,000 | 131,000
Demand Obligation [Member] | Level 1 [Member] |  |
Assets: |  |
Investments, Fair Value Disclosure | 0 | 0
Demand Obligation [Member] | Level 2 [Member] |  |
Assets: |  |
Investments, Fair Value Disclosure | $ 131,000 | $ 131,000

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- Definition Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Trading Securities -URI http://asc.fasb.org/extlink&oid=6526789 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 35 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27723805&loc=d3e24584-111560 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51813488&loc=d3e22054-111558 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Subparagraph a, f, g -Article 7 + Details
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