Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in-Capital	Accumulated Other Comprehensive Loss	Company Shares Held by DCP	Retained Earnings	Noncontrolling Interest
Balance (in shares) at Dec. 31, 2022		22,624,031
Balance at Dec. 31, 2022	$ 626.9	$ 4.5	$ 135.8	$ (40.1)	$ (1.1)	$ 527.8	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	12.1					12.1
Other comprehensive income (loss)	0.1			0.0			0.1
Dividends	(2.9)		0.0			(2.9)
Share-based compensation	0.8		0.8
Issuance of common stock under incentive plan (in shares)		66,536
Withholding tax paid upon equity award vesting	(1.4)		(1.4)
Balance (in shares) at Mar. 31, 2023		22,690,567
Balance at Mar. 31, 2023	635.6	$ 4.5	135.2	(40.1)	(1.1)	537.0	0.1
Balance (in shares) at Dec. 31, 2022		22,624,031
Balance at Dec. 31, 2022	626.9	$ 4.5	135.8	(40.1)	(1.1)	527.8	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	25.3
Other comprehensive income (loss)	0.6
Balance (in shares) at Jun. 30, 2023		22,736,570
Balance at Jun. 30, 2023	647.5	$ 4.5	136.4	(39.6)	(1.1)	547.1	0.2
Balance (in shares) at Mar. 31, 2023		22,690,567
Balance at Mar. 31, 2023	635.6	$ 4.5	135.2	(40.1)	(1.1)	537.0	0.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	13.2					13.1	0.1
Other comprehensive income (loss)	0.5			0.5			0.0
Dividends	(3.0)					(3.0)
Share-based compensation	1.4		1.4
Issuance of common stock under incentive plan (in shares)		46,003
Withholding tax paid upon equity award vesting	(0.2)		(0.2)
Balance (in shares) at Jun. 30, 2023		22,736,570
Balance at Jun. 30, 2023	$ 647.5	$ 4.5	136.4	(39.6)	(1.1)	547.1	0.2
Balance (in shares) at Dec. 31, 2023	22,740,635	22,740,635
Balance at Dec. 31, 2023	$ 653.7	$ 4.5	138.4	(38.1)	(0.8)	549.4	0.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	3.3					3.4	(0.1)
Other comprehensive income (loss)	(4.4)			(4.4)
Dividends	(2.9)		0.1			(3.0)
Share-based compensation	1.2		1.2
Issuance of common stock under incentive plan (in shares)		24,328
Withholding tax paid upon equity award vesting	(0.4)		(0.4)
Balance (in shares) at Mar. 31, 2024		22,764,963
Balance at Mar. 31, 2024	$ 650.5	$ 4.5	139.3	(42.5)	(0.8)	549.8	0.2
Balance (in shares) at Dec. 31, 2023	22,740,635	22,740,635
Balance at Dec. 31, 2023	$ 653.7	$ 4.5	138.4	(38.1)	(0.8)	549.4	0.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(10.7)
Other comprehensive income (loss)	$ (5.8)
Balance (in shares) at Jun. 30, 2024	22,800,581	22,800,581
Balance at Jun. 30, 2024	$ 633.3	$ 4.6	140.3	(43.7)	(0.7)	532.8	0.0
Balance (in shares) at Mar. 31, 2024		22,764,963
Balance at Mar. 31, 2024	650.5	$ 4.5	139.3	(42.5)	(0.8)	549.8	0.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) income	(14.0)					(14.0)	0.0
Other comprehensive income (loss)	(1.4)			(1.2)			(0.2)
Dividends	(3.0)		0.0			(3.0)
Share-based compensation	1.1		1.1
Issuance of common stock under incentive plan (in shares)		35,618
Issuance of common stock under incentive plan	0.1	$ 0.1
Withholding tax paid upon equity award vesting	(0.1)		(0.1)
Deferred compensation programs' transactions, net	$ 0.1		0.0		0.1
Balance (in shares) at Jun. 30, 2024	22,800,581	22,800,581
Balance at Jun. 30, 2024	$ 633.3	$ 4.6	$ 140.3	$ (43.7)	$ (0.7)	$ 532.8	$ 0.0