Equity-Method Investments - Schedule of Condensed Results of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Company’s (loss) income from partially owned entities	$ (1,069)	$ (1,363)	$ (128)
Total
Schedule of Equity Method Investments [Line Items]
Revenues	51,079	50,956	44,334
Operating (loss) income	684	(1,738)	2,097
Net loss	(309)	(2,775)	146
Company’s (loss) income from partially owned entities	(1,069)	(1,363)	(128)
CMAL
Schedule of Equity Method Investments [Line Items]
Revenues	37,458	38,662	34,945
Operating (loss) income	(1,748)	(2,052)	(2,184)
Net loss	(1,960)	(2,479)	(2,645)
Company’s (loss) income from partially owned entities	(1,419)	(1,143)	(1,396)
CMAH
Schedule of Equity Method Investments [Line Items]
Revenues	13,621	12,294	9,389
Operating (loss) income	2,432	314	4,281
Net loss	1,651	(296)	2,791
Company’s (loss) income from partially owned entities	$ 350	$ (220)	$ 1,268