Summary of Significant Accounting Policies (Details)	3 Months Ended
	Mar. 31, 2019 USD ($)
Property, Plant and Equipment [Line Items]
Liabilities	$ 35,804,000
Right-of-use asset	96,805,000
Accounting Standards Update 2016-02 [Member]
Property, Plant and Equipment [Line Items]
Liabilities	5,752,000
Right-of-use asset	$ 103,897,000
Liability Classified Awards [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Award vesting period	3 years