Leases and Leases Commitments - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) Lease	Mar. 31, 2018 USD ($)	Jan. 01, 2019 USD ($)
Lessee Lease Description [Line Items]
Options to extend the leases	5 years
Operating cash flows used for operating leases	$ 11,302
Total operating lease expense	9,400	$ 7,600
Short-term leases expense	1,300
Operating lease assets	$ 157,000
Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List	us-gaap:OtherAssetsMember
Mooring Equipment [Member]
Lessee Lease Description [Line Items]
Number of additional operating lease not yet commenced | Lease	3
Operating lease payments, lease not yet commenced	$ 12,000
Aggregate operating lease liability, lease not yet commenced	$ 36,000
Lease expected to commence lease term	10 years
ASU 2016-02 [Member]
Lessee Lease Description [Line Items]
Operating lease assets			$ 146,800
ASU 2016-02 [Member] | Sale and Lease-back Equipment [Member]
Lessee Lease Description [Line Items]
Operating lease term	10 years
Options to extend the leases	5 years
Operating cash flows used for operating leases	$ 26,000
Sale lease back transaction renewal term description	Renewal options for two successive five-year periods.
Sale leaseback transaction service period	ten-year
ASU 2016-02 [Member] | Prepaid Expenses and Other Current Assets [Member]
Lessee Lease Description [Line Items]
Prepaid rent			3,900
ASU 2016-02 [Member] | Other Assets [Member]
Lessee Lease Description [Line Items]
Prepaid rent			$ 10,600
Minimum [Member]
Lessee Lease Description [Line Items]
Operating lease term	1 month
Maximum [Member]
Lessee Lease Description [Line Items]
Operating lease term	10 years
Options to terminate the leases	1 year