Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 151,485		$ 0
Operating lease liability	168,028
Deferred Rent Credit			$ 18,000
Cumulative effect of a change in accounting principle	$ 12,808
Operating Lease, Weighted Average Remaining Lease Term	7 years 10 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	6.65%
Lease, Cost	$ 9,000
Lease, Operating Lease, Lease Not Yet Commenced, Amount	$ 12,000
Minimum
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	12 months
Lessee Operating Leases Remaining Lease Term	3 months
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract	11 years
Maximum
Lessee, Lease, Description [Line Items]
Lessee, Operating Lease, Term of Contract	40 years
Lessee Operating Leases Remaining Lease Term	15 years
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract	15 years
Accounting Standards Update 2016-02 [Member]
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets		$ 158,000
Operating lease liability		$ 174,000
Cumulative effect of a change in accounting principle	$ 13,000