Related Party Transactions - Narrative (Details) $ in Thousands |
1 Months Ended | 2 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Jan. 31, 2018 |
Dec. 31, 2002
USD ($)
Property
|
Nov. 30, 2004
USD ($)
Property
|
Dec. 31, 2017
USD ($)
lease
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
|
| Related Party Transaction [Line Items] | ||||||
| Lease term (in years) | 15 years | |||||
| Proceeds from disposition of business, net of cash acquired | $ 1,141 | $ 35,899 | $ 13,976 | |||
| Related Party | ||||||
| Related Party Transaction [Line Items] | ||||||
| Number of operating leases | lease | 10 | |||||
| Properties sold | Property | 10 | 11 | ||||
| Borrowings collateralized by the land and buildings | $ 5,000 | $ 6,800 | ||||
| Lease term (in years) | 15 years | |||||
| Aggregate annual rental | $ 800 | $ 800 | ||||
| Subsequent Event | Related Party | ||||||
| Related Party Transaction [Line Items] | ||||||
| Lease term (in years) | 5 years | |||||
| Subsequent Event | Minimum | Related Party | ||||||
| Related Party Transaction [Line Items] | ||||||
| Lease term (in years) | 5 years | |||||
| Subsequent Event | Maximum | Related Party | ||||||
| Related Party Transaction [Line Items] | ||||||
| Lease term (in years) | 8 years | |||||