Basis of Condensed Consolidated Financial Statements (Cash, Cash Equivalents and Restricted Cash) (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	$ 152,822	$ 105,185	$ 86,828
Restricted cash included in other assets	9,714		11,134
Restricted cash included in prepaid expenses and other current assets	178		1,985
Total cash, cash equivalents, and restricted cash	$ 162,714	$ 115,702	$ 99,947	$ 98,250