Summary of Series B Preferred Stock and Accretion of Dividend (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Stockholders Equity [Line Items]
Dividends earned on Series B preferred stock	$ 211	$ 205	$ 422	$ 410
Series B Preferred Stock
Stockholders Equity [Line Items]
Balance at beginning of period	28,507	27,677	28,296	27,472
Dividends earned on Series B preferred stock	211	205	422	410
Balance at end of period	$ 28,718	$ 27,882	$ 28,718	$ 27,882
Number of shares at beginning of period	7,127	6,919	7,074	6,868
Cumulative dividends on Series B convertible preferred stock	53	52	106	103
Number of shares at end of period	7,180	6,971	7,180	6,971

- Definition

Value of nonredeemable preferred shares and preferred shares redeemable solely at option of issuer, held by shareholders. Excludes preferred shares repurchased and held as treasury shares.

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