Long-Term Debt - Summary of Long-Term Debt (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity		$ 221.9
Senior Notes [Abstract]
Other		3.4	$ 3.8
Less unamortized debt issuance costs	[1]	(17.2)	(18.4)
Total long-term debt		1,360.7	1,211.3
Less current portion of long-term debt		2.0	1.8
Total long-term debt, excluding current portion		1,358.7	1,209.5
Revolving Credit Facility
Debt Instrument [Line Items]
Long-term Line of Credit		$ 147.2	$ 0.0
Senior Notes [Abstract]
Weighted average interest rate		3.90%	4.30%
7.625% Notes
Summary of Long-term debt
Borrowings under Notes	[2]	$ 351.0	$ 351.1
Senior Notes [Abstract]
Fixed rate		7.625%	7.625%
Effective interest rate		8.10%	8.00%
Notes Due April 2023 at Fixed Rate of 7.75% Interest Payments
Summary of Long-term debt
Borrowings under Notes		$ 325.0	$ 325.0
Senior Notes [Abstract]
Fixed rate		7.75%	7.75%
Effective interest rate		8.10%	8.10%
Notes Due January Two Thousand Twenty One at Fixed Rated Eleven Point Five Percentage Interest Payments [Member]
Summary of Long-term debt
Borrowings under Notes		$ 550.0	$ 550.0
Capital Lease Obligations
Senior Notes [Abstract]
Finance lease obligations, at various interest rates, interest and monthly principal payments		3.9	2.7
Less unamortized discounts
Senior Notes [Abstract]
Less unamortized discounts		$ (2.6)	$ (2.9)
Notes due April twenty twenty-five at Eleven percent interest payments [Member]
Senior Notes [Abstract]
Fixed rate		11.00%	11.00%
Effective interest rate		11.30%	11.20%
Interest Expense | Fair Value Hedging
Senior Notes [Abstract]
Liabilities, fair value adjustment		$ 1.0	$ 1.1

[1] Deferred debt issuance costs are being amortized by the effective interest rate method over the lives of the related debt instruments. These amounts are net of accumulated amortization of $16.9 million and $15.7 million at March 31, 2020 and December 31, 2019, respectively.

[2] The balance includes a fair value interest rate hedge adjustment, which increased the debt balance by $1.0 million and $1.1 million as of March 31, 2020 and December 31, 2019, respectively.