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Organization and Summary of Significant Accounting Policies - Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Carrying Amount
Summary of the fair value and carrying value of debt
Total debt	$ 1,562,542	$ 1,576,882
Carrying Amount | Fixed rate debt
Summary of the fair value and carrying value of debt
Total debt	682,019	680,484
Carrying Amount | Floating rate debt
Summary of the fair value and carrying value of debt
Total debt	880,523	896,398
Fair Value
Summary of the fair value and carrying value of debt
Total debt	1,507,000	1,421,000
Fair Value | Fixed rate debt
Summary of the fair value and carrying value of debt
Total debt	626,000	524,000
Fair Value | Floating rate debt
Summary of the fair value and carrying value of debt
Total debt	$ 881,000	$ 897,000

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13476-108611

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+ References

No definition available.

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