Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Revenue:	$ 295,437	$ 385,715	$ 643,337	$ 741,528
Income (loss) from continuing operations before interest expense and income taxes:	5,985	49,022	(25,588)	81,991
Interest expense	7,722	10,272	16,037	20,477
Income tax (benefit) provision	(1,320)	14,798	(4,749)	17,800
Net (loss) income from continuing operations	(417)	23,952	(36,876)	43,714
Total	(4,893)	7,118	29,614	(2,263)
Depreciation and amortization	16,245	16,428	32,480	32,659
Diversified industrial net sales
Segment Reporting Information [Line Items]
Revenue:	252,172	300,049	514,472	580,970
Income (loss) from continuing operations before interest expense and income taxes:	13,162	15,606	28,036	30,651
Depreciation and amortization	12,383	11,868	24,650	23,522
Energy net revenue
Segment Reporting Information [Line Items]
Revenue:	14,302	43,532	52,904	82,518
Income (loss) from continuing operations before interest expense and income taxes:	(5,352)	329	(5,150)	(1,426)
Depreciation and amortization	3,731	4,420	7,487	8,865
Financial services revenue
Segment Reporting Information [Line Items]
Revenue:	28,963	42,134	75,961	78,040
Income (loss) from continuing operations before interest expense and income taxes:	(815)	14,344	3,191	27,576
Depreciation and amortization	92	101	263	199
Corporate and other
Segment Reporting Information [Line Items]
Income (loss) from continuing operations before interest expense and income taxes:	(1,010)	18,743	(51,665)	25,190
Total	(4,893)	7,118	29,614	(2,263)
Depreciation and amortization	$ 39	$ 39	$ 80	$ 73