Subsequent Events - Additional Information (Detail) - 2300 Windy Ridge LLC $ in Millions		12 Months Ended
	Jan. 31, 2024 USD ($) ft²	Dec. 31, 2023	Jan. 30, 2024 ft²
Subsequent Event [Line Items]
Lease expiration date prior to amendment		Sep. 30, 2025
Subsequent Event
Subsequent Event [Line Items]
Operating lease description	On January 31, 2024, Manhattan executed the eighth amendment to its corporate headquarters lease agreement with 2300 Windy Ridge LLC ("Lessor”). Under the amendment, Manhattan extended its lease termination date from September 30, 2025, to September 30, 2036 for substantially all of its leased premises, for additional minimum rental payments of $67.2 million over the extended lease term and changed its base square footage from approximately 221,000 to 209,000 square feet. Manhattan also received $12.6 million in tenant allowances. While the parties delivered executed copies of the amendment into escrow, effectiveness of the amendment is subject to the satisfaction or waiver of several conditions, including the Lessor obtaining new financing for the property and delivery of a letter of credit in favor of Manhattan for the tenant allowance.
Lease termination date	Sep. 30, 2036
Additional minimum rental payments	$ 67.2
Operating lease, space leased | ft²	209,000		221,000
Lessee tenant allowance acquired	$ 12.6