Investments in Unconsolidated Affiliates (Details) - USD ($)		1 Months Ended				3 Months Ended		12 Months Ended
	Oct. 01, 2018	Dec. 31, 2017	Feb. 28, 2017	Apr. 30, 2016	Jan. 31, 2016	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Cash payment for acquisition	$ 10,000,000.0
Recognized net loss from investment								$ 0	$ 0	$ 1,430,000
Impairment of investments in unconsolidated affiliates								0	2,500,000	0
Losses from equity investment								0	0	468,000
Loss on deconsolidation of subsidiary								0	3,505,000	0
Proceeds from sales of AREC assets		$ 2,800,000						0	2,775,000	0
Receivable		121,353,000						$ 85,197,000	121,353,000
AREC
Schedule of Equity Method Investments [Line Items]
Loss on deconsolidation of subsidiary							$ 1,600,000
DIP amount outstanding		$ 400,000				$ 400,000			$ 400,000
AREC | Disposal Group, Held-for-sale, Not Discontinued Operations
Schedule of Equity Method Investments [Line Items]
Loss on disposal						1,900,000
Bencap LLC
Schedule of Equity Method Investments [Line Items]
Maximum borrowing amount					$ 1,500,000
Income tax benefit										800,000
Percentage of equity method investment								0.00%
VestaCare, Inc.
Schedule of Equity Method Investments [Line Items]
Voting interest				3.00%
Impairment of investments in unconsolidated affiliates						$ 2,500,000
Percentage of equity method investment				15.00%				15.00%
AREC
Schedule of Equity Method Investments [Line Items]
Receivable								$ 400,000
Bencap LLC
Schedule of Equity Method Investments [Line Items]
Voting interest					30.00%
Cash payment for acquisition					$ 2,200,000
Recognized net loss from investment										1,400,000
Impairment of investments in unconsolidated affiliates										1,700,000
Losses from equity investment										$ 500,000
Additional funding request			$ 500,000
VestaCare, Inc.
Schedule of Equity Method Investments [Line Items]
Cash payment for acquisition				$ 2,500,000