CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Restricted cash	$ 28,733	$ 30,668	$ 21,066	$ 11,789
Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]
Cash	22,183	20,104	16,462	14,735
Variable Interest Entity, Primary Beneficiary [Member]
Cash	$ 35,105	$ 25,211	$ 24,348	$ 20,685