Condensed Consolidated Statements of Cash Flows (Unaudited) Reconciliation of Cash, Restricted Cash, and Cash Equivalents - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Statement of Cash Flows [Abstract]
Cash and cash equivalents		$ 60,215	$ 82,486	$ 79,184	$ 76,649
Cash and cash equivalents – restricted	[1]	50,689	46,888	55,616	73,657
Other long-term assets	[1]	1,019	1,602	1,621	1,427
Cash, restricted cash, and equivalents		$ 111,923	$ 130,976	$ 136,421	$ 151,733

[1] Reflects cash and cash equivalents that are primarily restricted for claims payments.