Restricted Cash (Tables)

3 Months Ended

Mar. 31, 2019

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]

Schedule of Cash and Cash Equivalents [Table Text Block]

	March 31,				December 31,
	2019		2018		2018		2017
Cash and cash equivalents	$	71,960	$	92,581	$	104,147	$	89,879
Restricted cash included in other assets		20,153		21,105		20,278		21,171
Cash, cash equivalents and restricted cash	$	92,113	$	113,686	$	124,425	$	111,050