Basis of Presentation and Consolidation (Tables)

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Reconciliation of Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Condensed Consolidated Balance Sheets to the total of the same such amounts reported within the Condensed Consolidated Statements of Cash Flows:

	June 30, 2018 (Unaudited)		June 30, 2017 (Unaudited)		December 31, 2017		December 31, 2016
Cash and cash equivalents	$	180,493	$	302,386	$	371,684	$	504,423
Restricted cash included in Other current assets	1,702		614		19,200		18,499
Restricted cash included in Other assets	2,090		1,337		1,422		1,327
Total cash, cash equivalents and restricted cash	$	184,285	$	304,337	$	392,306	$	524,249