Operating Leases (Details) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
Lease
|
Dec. 31, 2014
USD ($)
|
|
| Leases [Abstract] | |||
| Number of operating leases terminated | Lease | 4 | ||
| Liability accrued from terminating lease contracts | $ 4,600 | ||
| Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] | |||
| 2017 | $ 46,517 | ||
| 2018 | 42,917 | ||
| 2019 | 39,181 | ||
| 2020 | 34,415 | ||
| 2021 | 28,728 | ||
| Thereafter | 143,558 | ||
| Total minimum operating lease payments | 335,316 | ||
| Operating Leased Assets [Line Items] | |||
| Operating leases expense | 47,300 | 40,100 | $ 18,800 |
| Operating Leases, Rent Expense, Net [Abstract] | |||
| 2017 | 1,101 | ||
| 2018 | 1,137 | ||
| 2019 | 658 | ||
| 2020 | 468 | ||
| 2021 | 312 | ||
| Thereafter | 1,919 | ||
| Total non-cancellable sub-lease income | 5,595 | ||
| Operating lease agreements, with physician investors | |||
| Operating Leased Assets [Line Items] | |||
| Operating leases expense | $ 14,400 | $ 12,900 | $ 6,900 |