Borrowing Arrangements - Narrative (Details)	1 Months Ended	3 Months Ended	12 Months Ended
	May 31, 2019 USD ($)	Sep. 30, 2021	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2020 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Feb. 16, 2021 USD ($)	May 06, 2020 USD ($)
Debt Instrument [Line Items]
Debt instrument, covenant compliance			As of December 31, 2021, the Company was in compliance with its debt covenants under the Amended Credit Agreement.
Long-term borrowings			$ 324,000,000.0	$ 362,100,000
Notional amount			222,300,000
Redemptions of convertible debentures			0	0
Approximate redemption value of convertible debentures			$ 1,100,000	1,100,000
Interest Rate Contract
Debt Instrument [Line Items]
Interest rate collar, term	3 years
Notional amount	$ 222,300,000
Derivative, cap interest rate			2.50%
Liability			$ 700,000	3,100,000
Interest paid			$ 2,500,000	1,600,000
Senior Credit Facility, Net of Discount
Debt Instrument [Line Items]
Maturity Date			Nov. 30, 2023
Long-term borrowings			$ 301,600,000	$ 332,300,000
Weighted average interest rate			3.60%	3.60%
Convertible Subordinated Debt
Debt Instrument [Line Items]
Redemption price upon stated maturity (in dollars per share) | $ / shares			$ 19.18
Convertible debentures maturity per share | $ / shares			$ 25
Amended Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 595,000,000.0
Percentage principal installments			1.875%
Amended Credit Agreement | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 325,000,000.0	370,000,000.0
Decrease to borrowing capacity							45,000,000.0
Liquidity test minimum					$ 40,000,000.0	$ 40,000,000.0
Additional liquidity test minimum							$ 40,000,000.0
Amended Credit Agreement | Letter of Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity								100,000,000.0
Amended Credit Agreement | Term Loan Facility
Debt Instrument [Line Items]
Maximum borrowing capacity								$ 225,000,000.0
Amended Credit Agreement | Senior Credit Facility, Net of Discount
Debt Instrument [Line Items]
Fees and other closing cost			$ 1,200,000
Letters Of Credit Outstanding Amount			46,400,000
Long-term borrowings			$ 302,100,000
Amended Credit Agreement | Senior Credit Facility, Net of Discount | Maximum
Debt Instrument [Line Items]
Total debt to EBITDA ratio that is required to be maintained		4.75	3.0
Amended Credit Agreement | Senior Credit Facility, Net of Discount | Minimum
Debt Instrument [Line Items]
Total debt to EBITDA ratio that is required to be maintained		1.0
Fixed coverage ratio that is required to be maintained			1.0
Amended Credit Agreement | Senior Credit Facility, Net of Discount | Revolving Credit Facility
Debt Instrument [Line Items]
Interest rate			0.375%
Amended Credit Agreement | Senior Credit Facility, Net of Discount | L I B O R Loans
Debt Instrument [Line Items]
Period of total debt to EBITDA ratio			12 months
Amended Credit Agreement | Senior Credit Facility, Net of Discount | Base Rate Loans | Federal Funds
Debt Instrument [Line Items]
Interest rate margin on variable rate basis			0.50%
Amended Credit Agreement | Senior Credit Facility, Net of Discount | Base Rate Loans | LIBOR
Debt Instrument [Line Items]
Interest rate margin on variable rate basis			2.75%
Floor interest rate			1.00%
Senior Credit Facility | Senior Credit Facility, Net of Discount
Debt Instrument [Line Items]
Weighted average interest rate			3.80%	3.80%