Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies.

Summary of future minimum lease payments

Year ended December 31,	Future minimum lease payments
	(in thousands)
2019	$	15,586
2020		15,664
2021		14,693
2022		12,107
2023		11,155
Thereafter		24,495
	$	93,700