Background and Business Description - Additional Information (Detail)		12 Months Ended
	Apr. 29, 1991	Dec. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2019	Dec. 31, 2024 shares	Apr. 30, 2013 $ / shares
Background And Basis Of Presentation [Line Items]
Common stock, shares authorized | shares		130,000,000		130,000,000
Common stock, par value (in dollars per share) | $ / shares					$ 0.01
Preferred stock, shares authorized | shares		20,000,000		20,000,000
Preferred Stock, Par or Stated Value Per Share | $ / shares		$ 0.01			$ 0.01
Common Stock Transfer Restrictions	5.00%
Common Stock Additional Transfer Restrictions			5.00%
Number of Admitted Carriers Owned | $		5
Number of Reportable Segments		2