CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Statement Of Cash Flows [Abstract]
Cash and cash equivalents, beginning balance	$ 21,268	$ 74,823
Cash and cash equivalents, ending balance	48,140	9,525
Restricted cash, beginning balance	13,580	10,846
Restricted cash, ending balance	12,867	12,508
Cash paid for capitalized interest	$ 8,430	$ 4,366