Segment Information (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenues	$ 182,659,000			$ 225,831,000			$ 526,925,000	$ 753,552,000
Other operating income	2,000			0			44,000	7,795,000
Operating expenses	189,963,000			232,518,000			549,216,000	776,677,000
Operating income (loss)	(7,302,000)			(6,687,000)			(22,247,000)	(15,330,000)
Allocated corporate and other costs	0			0			0	0
Other loss, net	(1,175,000)			(3,678,000)			(4,697,000)	(3,664,000)
Loss before income taxes	(8,477,000)			(10,365,000)			(26,944,000)	(18,994,000)
(Provision) benefit for income taxes	(31,000)			164,000			(99,000)	(194,000)
Net loss	(8,508,000)	$ (8,805,000)	$ (9,730,000)	(10,201,000)	$ (12,302,000)	$ 3,315,000	(27,043,000)	(19,188,000)
Restructuring expenses	1,570,000			1,220,000			1,944,000	16,859,000
Strategic Plan
Segment Reporting Information [Line Items]
Restructuring expenses	(66,000)			1,220,000			308,000	16,859,000
Operating Segments | Residential
Segment Reporting Information [Line Items]
Revenues	168,113,000			210,449,000			483,595,000	701,164,000
Other operating income	2,000						44,000	7,776,000
Operating expenses	159,451,000			200,570,000			460,111,000	671,991,000
Operating income (loss)	8,664,000			9,879,000			23,528,000	36,949,000
Allocated corporate and other costs	(8,885,000)			(10,388,000)			(25,566,000)	(34,811,000)
Other loss, net	(400,000)			(3,202,000)			(2,179,000)	(2,557,000)
Loss before income taxes	(621,000)			(3,711,000)			(4,217,000)	(419,000)
(Provision) benefit for income taxes	0			0			0	0
Net loss	(621,000)			(3,711,000)			(4,217,000)	(419,000)
Operating Segments | Residential | Strategic Plan
Segment Reporting Information [Line Items]
Restructuring expenses				813,000			476,000	12,344,000
Operating Segments | Residential | Strategic Plan | DHC
Segment Reporting Information [Line Items]
Restructuring expenses	2,000			813,000				12,344,000
Operating Segments | Lifestyle Services
Segment Reporting Information [Line Items]
Revenues	14,546,000			15,382,000			43,330,000	52,388,000
Other operating income	0						0	19,000
Operating expenses	14,672,000			13,349,000			42,444,000	47,204,000
Operating income (loss)	(126,000)			2,033,000			886,000	5,203,000
Allocated corporate and other costs	(654,000)			(770,000)			(2,166,000)	(2,621,000)
Other loss, net	0			0			0	0
Loss before income taxes	(780,000)			1,263,000			(1,280,000)	2,582,000
(Provision) benefit for income taxes	0			0			0	0
Net loss	(780,000)			1,263,000			(1,280,000)	2,582,000
Operating Segments | Lifestyle Services | Strategic Plan
Segment Reporting Information [Line Items]
Restructuring expenses				(310,000)				1,410,000
Corporate and Other
Segment Reporting Information [Line Items]
Revenues	0			0			0	0
Other operating income	0						0	0
Operating expenses	15,840,000			18,599,000			46,661,000	57,482,000
Operating income (loss)	(15,840,000)			(18,599,000)			(46,661,000)	(57,482,000)
Allocated corporate and other costs	9,539,000			11,158,000			27,732,000	37,432,000
Other loss, net	(775,000)			(476,000)			(2,518,000)	(1,107,000)
Loss before income taxes	(7,076,000)			(7,917,000)			(21,447,000)	(21,157,000)
(Provision) benefit for income taxes	(31,000)			164,000			(99,000)	(194,000)
Net loss	(7,107,000)			(7,753,000)			(21,546,000)	(21,351,000)
Restructuring expenses	1,568,000						1,468,000
Corporate and Other | Strategic Plan
Segment Reporting Information [Line Items]
Restructuring expenses	$ (68,000)			$ 717,000			$ (168,000)	$ 3,105,000