Unaudited Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Total paper and other revenue	$ 72.8	$ 69.2	$ 145.3	$ 137.6
Machine lease revenue	13.6	12.7	26.4	25.5
Net revenue	86.4	81.9	171.7	163.1
Cost of goods sold	54.7	51.7	107.7	105.4
Gross profit	31.7	30.2	64.0	57.7
Selling, general and administrative expenses	27.3	16.3	55.2	43.5
Depreciation and amortization expense	8.3	8.1	16.7	16.1
Other operating expense, net	1.3	1.4	2.1	2.6
Income (loss) from operations	(5.2)	4.4	(10.0)	(4.5)
Interest expense	5.3	5.9	11.5	11.6
Foreign currency (gain) loss	0.1	0.7	(1.3)	0.9
Other non-operating income, net	(17.9)	(0.4)	(17.9)	(0.7)
Income (loss) before income tax expense (benefit)	7.3	(1.8)	(2.3)	(16.3)
Income tax expense (benefit)	1.8	0.3	0.3	(1.8)
Net income (loss)	$ 5.5	$ (2.1)	$ (2.6)	$ (14.5)
Basic and diluted income (loss) per share
Basic (in usd per share)	$ 0.07	$ (0.03)	$ (0.03)	$ (0.18)
Diluted (in usd per share)	$ 0.07	$ (0.03)	$ (0.03)	$ (0.18)
Weighted average number of shares outstanding – Class A and C – basic
Basic (in shares)	83,071,520	82,432,158	82,876,914	82,285,291
Diluted (in shares)	83,123,636	82,432,158	82,876,914	82,285,291
Other comprehensive income (loss), before tax
Foreign currency translation adjustments	$ (0.1)	$ (1.2)	$ (2.2)	$ 0.9
Interest rate swap adjustments	(0.8)	(1.0)	(3.4)	(3.1)
Total other comprehensive loss, before tax	(0.9)	(2.2)	(5.6)	(2.2)
Benefit for income taxes related to other comprehensive income (loss)	(0.1)	(0.4)	0.0	(1.2)
Total other comprehensive loss, net of tax	(0.8)	(1.8)	(5.6)	(1.0)
Comprehensive income (loss), net of tax	$ 4.7	$ (3.9)	$ (8.2)	$ (15.5)
Class A common stock
Basic and diluted income (loss) per share
Basic (in usd per share)	$ 0.07	$ (0.03)	$ (0.03)	$ (0.18)
Diluted (in usd per share)	$ 0.07	$ (0.03)	$ (0.03)	$ (0.18)
Weighted average number of shares outstanding – Class A and C – basic
Basic (in shares)	80,150,421	79,511,059	79,955,815	79,364,192
Diluted (in shares)	80,202,537	79,511,059	79,955,815	79,364,192
Class C common stock
Basic and diluted income (loss) per share
Basic (in usd per share)	$ 0.07	$ (0.03)	$ (0.03)	$ (0.17)
Diluted (in usd per share)	$ 0.07	$ (0.03)	$ (0.03)	$ (0.17)
Weighted average number of shares outstanding – Class A and C – basic
Basic (in shares)	2,921,099	2,921,099	2,921,099	2,921,099
Diluted (in shares)	2,921,099	2,921,099	2,921,099	2,921,099
Paper revenue
Total paper and other revenue	$ 67.5	$ 63.3	$ 133.7	$ 127.6
Other revenue
Total paper and other revenue	$ 5.3	$ 5.9	$ 11.6	$ 10.0