CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Statement of Cash Flows [Abstract]
Restricted cash included in other assets	$ 998	$ 952	$ 931	$ 921
Payment period for purchase of noncontrolling interests	4 years