Background and Business Description Rehabilitation Exit Support Agreement (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Apr. 29, 1991	Dec. 31, 2018	Dec. 31, 2024	Dec. 31, 2023	Apr. 30, 2013
Preferred stock, shares outstanding (in shares)			0	0
Common stock, shares authorized			130,000,000	130,000,000
Common stock, par value (in dollars per share)					$ 0.01
Preferred stock, shares authorized			20,000,000	20,000,000
Preferred Stock, Par or Stated Value Per Share			$ 0.01		$ 0.01
Common stock, shares issued			48,875,167	46,659,144
Common Stock Voting Restrictions	10.00%
Common Stock Voting Restriction Less One Vote	10.00%
Common Stock Transfer Restrictions	5.00%
Common Stock Additional Transfer Restrictions		5.00%
Stockholders' Equity Attributable to Noncontrolling Interest			$ 197,755	$ 52,958
Ambac Assurance Corporation
Preferred stock, shares outstanding (in shares)			4,596	4,596
Preferred stock, liquidation preference, value			$ 114,900	$ 114,900
Stockholders' Equity Attributable to Noncontrolling Interest			$ 50,918