Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenue:
Revenues	$ 1,584,614	$ 1,372,027
Total revenue	1,584,614	1,372,027
Costs and expenses:
Cost of goods sold	1,109,978	958,490
Selling, general and administrative expenses	352,794	337,719
Asset impairment charges	8,108	2,028
Finance interest expense	10,288	4,685
Provision for loan losses	19,058	5,639
Interest expense	39,234	22,804
Realized and unrealized losses (gains) on securities, net	62,586	(790)
Other (income) expense, net	(8,010)	1,029
Total costs and expenses	1,594,036	1,331,604
(Loss) income before income taxes and equity method investments	(9,422)	40,423
Income tax provision	12,559	51,299
Loss (income) of associated companies, net of taxes	9,509	(16,888)
Net income	(31,490)	6,012
Net income attributable to noncontrolling interests in consolidated entities	(1,114)	(6,028)
Net loss attributable to common unitholders	$ (32,604)	$ (16)
Net loss per common unit - basic and diluted
Net (loss) income attributable to common unitholders (in dollars per share)	$ (1.25)	$ 0.00
Weighted-average number of common units outstanding - basic and diluted (in shares)	25,984,185	26,053,098
Diversified Industrial
Revenue:
Revenues	$ 1,286,665	$ 1,156,187
Energy Service
Revenue:
Revenues	175,950	135,461
Financial Service
Revenue:
Revenues	$ 121,999	$ 80,379