Debt - Knicks and Rangers Revolving Credit Facilities (Narrative) (Details) - Secured Debt			9 Months Ended
	Jan. 25, 2017 USD ($)	Sep. 30, 2016 USD ($)	Mar. 31, 2025 USD ($) fiscal_quarter	Dec. 14, 2021 USD ($)
Knicks Revolving Credit Facility
Line of Credit Facility [Line Items]
Principal repayment			$ 8,000,000
Line of credit facility amount outstanding			$ 267,000,000
Effective interest rate			5.67%
Interest payments			$ 12,897,000
Rangers Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility amount outstanding			0
Interest payments			$ 0
Knicks | 2016 Knicks Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 200,000,000
Debt instrument, term		5 years
Knicks | Knicks Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 275,000,000
Debt instrument collateral			All obligations under the Knicks Revolving Credit Facility are secured by a first lien security interest in certain of Knicks LLC’s assets, including, but not limited to, (i) the Knicks LLC’s membership rights in the NBA, (ii) revenues to be paid to Knicks LLC by the NBA pursuant to certain U.S. national broadcast agreements, and (iii) revenues to be paid to Knicks LLC pursuant to local media contracts.
Subjective acceleration clause			Knicks LLC is required to make mandatory prepayments in certain circumstances, including without limitation if the maximum available amount under the Knicks Revolving Credit Facility is greater than 350% of qualified revenues.
Mandatory prepayment clause - qualified revenues reference threshold (percent)			350.00%
Restrictive covenants			The Knicks Revolving Credit Facility contains certain restrictions on the ability of Knicks LLC to take certain actions as provided in (and subject to various exceptions and baskets set forth in) the Knicks Revolving Credit Facility, including the following: (i) incurring additional indebtedness and contingent liabilities; (ii) creating liens on certain assets; (iii) making restricted payments during the continuance of an event of default under the Knicks Revolving Credit Facility; (iv) engaging in sale and leaseback transactions; (v) merging or consolidating; and (vi) taking certain actions that would invalidate the secured lenders’ liens on any Knicks LLC’s collateral.
Debt service ratio			1.5
Debt service ratio, terms, number of trailing quarters | fiscal_quarter			4
Covenant compliance			Knicks LLC was in compliance with this financial covenant.
Knicks | Secured Overnight Financing Rate (SOFR) | Knicks Revolving Credit Facility
Line of Credit Facility [Line Items]
Credit spread adjustment (as a percent)			0.10%
Knicks | Minimum | Knicks Revolving Credit Facility
Line of Credit Facility [Line Items]
Commitment fee percentage			0.25%
Knicks | Minimum | Base Rate | Knicks Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)			0.25%
Knicks | Minimum | Secured Overnight Financing Rate (SOFR) | Knicks Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)			1.25%
Knicks | Maximum | Knicks Revolving Credit Facility
Line of Credit Facility [Line Items]
Commitment fee percentage			0.30%
Knicks | Maximum | Base Rate | Knicks Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)			0.50%
Knicks | Maximum | Secured Overnight Financing Rate (SOFR) | Knicks Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)			1.50%
Rangers | 2017 Rangers Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 150,000,000
Debt instrument, term	5 years
Rangers | Rangers Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 250,000,000
Debt instrument collateral			All obligations under the Rangers Revolving Credit Facility are, subject to the Rangers NHL Advance Agreement (as defined below), secured by a first lien security interest in certain of Rangers LLC’s assets, including, but not limited to, (i) Rangers LLC’s membership rights in the NHL, (ii) revenues to be paid to Rangers LLC by the NHL pursuant to certain U.S. and Canadian national broadcast agreements, and (iii) revenues to be paid to Rangers LLC pursuant to local media contracts.
Subjective acceleration clause			Rangers LLC is required to make mandatory prepayments in certain circumstances, including without limitation if qualified revenues are less than 17% of the maximum available amount under the Rangers Credit Agreement.
Restrictive covenants			The Rangers Revolving Credit Facility contains certain restrictions on the ability of Rangers LLC to take certain actions as provided in (and subject to various exceptions and baskets set forth in) the Rangers Revolving Credit Facility, including the following: (i) incurring additional indebtedness and contingent liabilities; (ii) creating liens on certain assets; (iii) making restricted payments during the continuance of an event of default under the Rangers Revolving Credit Facility; (iv) engaging in sale and leaseback transactions; (v) merging or consolidating; and (vi) taking certain actions that would invalidate the secured lenders’ liens on any of Rangers LLC’s assets securing the obligations under the Rangers Revolving Credit Facility.The Rangers Credit Agreement includes an event of default upon a bankruptcy or insolvency event with respect to a material media rights counterparty, including MSG Networks.
Debt service ratio			1.5
Debt service ratio, terms, number of trailing quarters | fiscal_quarter			4
Covenant compliance			Rangers LLC was in compliance with this financial covenant
Rangers | Secured Overnight Financing Rate (SOFR) | Rangers Revolving Credit Facility
Line of Credit Facility [Line Items]
Credit spread adjustment (as a percent)			0.10%
Rangers | Minimum | Rangers Revolving Credit Facility
Line of Credit Facility [Line Items]
Commitment fee percentage			0.375%
Rangers | Minimum | Base Rate | Rangers Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)			0.50%
Rangers | Minimum | Secured Overnight Financing Rate (SOFR) | Rangers Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)			1.50%
Rangers | Maximum | Rangers Revolving Credit Facility
Line of Credit Facility [Line Items]
Commitment fee percentage			0.625%
Qualified revenues threshold, percentage of available credit facility			17.00%
Rangers | Maximum | Base Rate | Rangers Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)			1.00%
Rangers | Maximum | Secured Overnight Financing Rate (SOFR) | Rangers Revolving Credit Facility
Line of Credit Facility [Line Items]
Basis spread on variable rate (as a percent)			2.00%