Summary of Significant Accounting Policies - Additional Information (Details)
|
12 Months Ended |
|
Dec. 31, 2017
USD ($)
Loan
receivable
segment
|
Dec. 31, 2016
USD ($)
Loan
receivable
|
Dec. 31, 2015
USD ($)
Lease
|
| Summary Of Significant Accounting Policies [Line Items] |
|
|
|
| Net assets |
$ 7,263,511,000
|
$ 7,677,971,000
|
|
| Net liabilities |
$ 3,943,902,000
|
3,995,863,000
|
|
| Number of operating segments | segment |
1
|
|
|
| Amounts past due |
$ 0
|
0
|
|
| Impairments or allowances of direct financing lease |
$ 0
|
0
|
$ 4,800,000
|
| Number of direct financing leases with impairments | Lease |
|
|
2
|
| Rent escalators adjustment period |
1 year
|
|
|
| Threshold period for past due amounts |
60 days
|
|
|
| Impairment on existing goodwill |
$ 0
|
0
|
$ 0
|
| Goodwill written off from disposal of real estate assets not previously classified as held for sale |
0
|
10,010,000
|
21,498,000
|
| Reserves for uncollectible amounts |
12,400,000
|
6,400,000
|
|
| Accounts receivable |
27,200,000
|
25,300,000
|
|
| Provision for losses |
1,800,000
|
7,700,000
|
|
| Accrued rental revenue receivables |
81,600,000
|
71,100,000
|
|
| Allowance for loan losses |
$ 400,000
|
$ 500,000
|
|
| Loan placed on non accrual status, past due days |
60 days
|
|
|
| Number of loans on nonaccrual status | Loan |
5
|
0
|
|
| Receivables, nonaccrual status |
$ 1,500,000
|
$ 500,000
|
|
| Number of notes receivable on nonaccrual status | receivable |
0
|
1
|
|
| Federal income tax |
$ 0
|
|
|
| Discontinued Operations, Disposed of by Sale |
|
|
|
| Summary Of Significant Accounting Policies [Line Items] |
|
|
|
| Goodwill written off from disposal of real estate assets not previously classified as held for sale |
|
$ 6,300,000
|
12,700,000
|
| Interest income and other |
|
|
|
| Summary Of Significant Accounting Policies [Line Items] |
|
|
|
| Lease termination fee |
$ 5,000,000
|
7,300,000
|
$ 5,800,000
|
| Minimum |
|
|
|
| Summary Of Significant Accounting Policies [Line Items] |
|
|
|
| Rent escalator increase as ratio of CPI |
1
|
|
|
| Maximum |
|
|
|
| Summary Of Significant Accounting Policies [Line Items] |
|
|
|
| Rent escalator increase as ratio of CPI |
2
|
|
|
| Building and improvements | Minimum |
|
|
|
| Summary Of Significant Accounting Policies [Line Items] |
|
|
|
| Useful life |
20 years
|
|
|
| Building and improvements | Maximum |
|
|
|
| Summary Of Significant Accounting Policies [Line Items] |
|
|
|
| Useful life |
50 years
|
|
|
| Land improvements | Minimum |
|
|
|
| Summary Of Significant Accounting Policies [Line Items] |
|
|
|
| Useful life |
5 years
|
|
|
| Land improvements | Maximum |
|
|
|
| Summary Of Significant Accounting Policies [Line Items] |
|
|
|
| Useful life |
20 years
|
|
|
| Special purpose entities |
|
|
|
| Summary Of Significant Accounting Policies [Line Items] |
|
|
|
| Net assets |
$ 2,780,000,000
|
2,950,000,000
|
|
| Net liabilities |
$ 2,630,000,000
|
$ 2,260,000,000
|
|