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Debt (Narrative) (Details)					3 Months Ended
	Dec. 19, 2022	Jun. 02, 2021 USD ($)	Jun. 01, 2021	Jun. 18, 2020 USD ($) $ / shares	Mar. 31, 2023 USD ($) day	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 01, 2017 USD ($)
Line of Credit Facility [Line Items]
Secured term loan facility					$ 314,109,000		$ 314,779,000
Long-term debt					307,899,000		308,107,000
Interest expense					$ 6,100,000	$ 3,900,000
Interest Expense
Line of Credit Facility [Line Items]
Debt issuance costs		$ 361,000
Debt extinguishment costs		$ 474,000
Credit Agreement
Line of Credit Facility [Line Items]
Revolving credit facility, percentage repaid for no covenants					25.00%
Convertible Senior Notes
Line of Credit Facility [Line Items]
Interest rate on amounts borrowed				4.25%
Effective interest rate					5.05%
Face value				$ 100,000,000
Proceeds from issuance of convertible debt				$ 96,500,000
Conversion ratio				0.0426203
Conversion price (in dollars per share) | $ / shares				$ 23.46
Debt fair value					$ 90,700,000
Interest expense					1,200,000	$ 1,200,000
Unamortized debt issuance costs					$ 1,700,000		1,900,000
Convertible Senior Notes | Circumstance I
Line of Credit Facility [Line Items]
Conversion trading day threshold | day					20
Conversion consecutive trading day threshold | day					30
Conversion percentage of stock price threshold					130.00%
Convertible Senior Notes | Circumstance II
Line of Credit Facility [Line Items]
Conversion trading day threshold | day					5
Conversion consecutive trading day threshold | day					5
Conversion percentage of stock price threshold					98.00%
Convertible Senior Notes | Circumstance After July 5, 2023
Line of Credit Facility [Line Items]
Conversion trading day threshold | day					20
Conversion consecutive trading day threshold | day					30
Conversion percentage of stock price threshold					130.00%
Conversion percentage of principal amount					100.00%
Term Loan balance
Line of Credit Facility [Line Items]
Secured term loan facility					$ 213,188,000		213,750,000	$ 225,000,000
Term Loan balance | Credit Agreement | Circumstance I
Line of Credit Facility [Line Items]
Debt instrument, extension circumstance period		91 days
Term Loan balance | Credit Agreement | Circumstance II
Line of Credit Facility [Line Items]
Debt instrument, extension circumstance period		182 days
Term Loan balance | Base Rate
Line of Credit Facility [Line Items]
Credit facility margin			2.25%
Term Loan balance | Base Rate | Credit Agreement
Line of Credit Facility [Line Items]
Credit facility margin		2.50%
Term Loan balance | LIBOR
Line of Credit Facility [Line Items]
Credit facility margin			3.25%
Term Loan balance | LIBOR | Credit Agreement
Line of Credit Facility [Line Items]
Credit facility margin		3.50%
Term Loan balance | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Line of Credit Facility [Line Items]
Credit facility margin	3.50%
Revolving Credit Facility
Line of Credit Facility [Line Items]
Credit facility aggregate commitments								30,000,000
Revolving Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Minimum
Line of Credit Facility [Line Items]
Credit facility margin	4.00%
Revolving Credit Facility | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Maximum
Line of Credit Facility [Line Items]
Credit facility margin	4.25%
Revolving Credit Facility And Term Loan
Line of Credit Facility [Line Items]
Debt issuance costs		$ 2,100,000
Amortization of the debt issuance costs		$ 1,800,000
Revolving Credit Facility And Term Loan | Credit Agreement
Line of Credit Facility [Line Items]
Secured term loan facility								$ 255,000,000
Debt instrument, extension period		2 years 6 months
Effective interest rate					8.66%
Revolving Credit Facility And Term Loan | Convertible Senior Notes | Credit Agreement
Line of Credit Facility [Line Items]
Interest rate on amounts borrowed		4.25%
Accounting Standards Update 2020-06 | Cumulative Effect, Period of Adoption, Adjustment | Convertible Senior Notes
Line of Credit Facility [Line Items]
Long-term debt					$ 100,000,000		$ 100,000,000

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The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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