Organization and Basis of Presentation - Cash, Cash Equivalents and Restricted Cash And Cash Equivalents (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents-unrestricted	$ 271,877	$ 70,087	$ 107,034	$ 134,465
Cash and cash equivalents-restricted	10,470	11,007	17,092	16,930
Total unrestricted and restricted cash and cash equivalents shown in the condensed consolidated statement of cash flows	$ 282,347	$ 81,094	$ 124,126	$ 151,395