Fair Value Measurements and Financial Instruments - Summary of Partnership's Loan Receivables and Other Financing Receivables (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total net investments in direct financing and sales-type leases	$ 818,809
Loans and Leases Receivable, Net Amount [Abstract]
Total loans receivables and other financing receivables	953,447	$ 712,243
Performing Financial Instruments \| Pass
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Total net investments in direct financing and sales-type leases	818,809	575,163
Loans and Leases Receivable, Net Amount [Abstract]
Long-term receivable and accrued revenue included in other assets	8,092	5,694
Performing Financial Instruments \| Internal Investment Grade
Loans and Leases Receivable, Net Amount [Abstract]
Advances to equity-accounted joint ventures	$ 126,546	$ 131,386

For an unclassified balance sheet, amounts due from an entity in which the reporting entity shares joint control with another party or group.

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Amount after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Amount of net investment in sales-type and direct financing lease.

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