Leases - (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease Practical Expedient Transition Approach	true
Lease, Practical Expedients, Package [true false]	true
Lease Practical Expedient Lease Capitalization	true
Lease Practical Expedient Separate Lease Non Lease Components	false
Lease Practical Expedient Land Easement	true
Right of use assets	$ 29,798
lease payable obligation	29,798
Adjustment to retained earnings	0
Adjustment | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right of use assets	33,100
lease payable obligation	$ 33,100