Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liabilities	$ 48,224		$ 0
Operating lease right-of-use assets	$ 43,985		$ 0
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease liabilities		$ 49,100
Operating lease right-of-use assets		49,100
Favorable lease assets		541
Unfavorable lease liabilities		2,200
Deferred rent		$ 2,500