CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Previously Reported	Revision of Prior Period, Adjustment	Controlled Investments Revision of Prior Period, Adjustment	Common stock	Common stock Previously Reported	Common stock Revision of Prior Period, Adjustment	Preferred stock	Preferred stock Previously Reported	Preferred stock Controlled Investments Revision of Prior Period, Adjustment	Additional paid-in capital	Additional paid-in capital Previously Reported	Additional paid-in capital Revision of Prior Period, Adjustment	Additional paid-in capital Controlled Investments Revision of Prior Period, Adjustment	Accumulated other comprehensive income	Accumulated other comprehensive income Previously Reported	Accumulated undistributed earnings	Accumulated undistributed earnings Previously Reported	Accumulated undistributed earnings Revision of Prior Period, Adjustment	Retained earnings	Retained earnings Previously Reported
Beginning balance (in shares) at Dec. 31, 2021					24,159
Beginning balance at Dec. 31, 2021	$ 403,887				$ 483						$ 367,663						$ 35,741
Increase (Decrease) in Stockholders' Equity [Roll Forward]
DRIP shares issued (in shares)					50
DRIP shares issued	919				$ 1						918
Stock-based compensation expense, net of forfeitures	1,801										1,801
Dividends declared related to RSA (in shares)					9
Dividends declared related to RSA, net of accrued dividends forfeited	0										422						(422)
Purchase of vested stock for employee payroll tax withholding (in shares)					(30)
Purchase of vested stock for employee payroll tax withholding	(826)										(826)
Issuance of stock (in shares)					36
Issuance of stock	$ 726				$ 1						725
Restricted stock awards (in shares)	201
Dividends declared common shares	$ (49,241)																(49,241)
Dividends declared preferred shares	0
Other comprehensive income (loss), net of tax	0
Net Investment Income	(1,076)																(1,076)
Net realized gain on investments	50,398																50,398
Net unrealized depreciation on investments	(14,789)																(14,789)
Ending balance (in shares) at Sep. 30, 2022					24,425
Ending balance at Sep. 30, 2022	391,799				$ 485						370,703						20,611
Beginning balance (in shares) at Jun. 30, 2022					24,187
Beginning balance at Jun. 30, 2022	394,535				$ 483						368,934						25,118
Increase (Decrease) in Stockholders' Equity [Roll Forward]
DRIP shares issued (in shares)					20
DRIP shares issued	321				$ 1						320
Stock-based compensation expense, net of forfeitures	553										553
Dividends declared related to RSA, net of accrued dividends forfeited	0										(221)						221
Purchase of vested stock for employee payroll tax withholding	(50)										(50)
Issuance of stock (in shares)					36
Issuance of stock	$ 726				$ 1						725
Restricted stock awards (in shares)	182
Dividends declared common shares	$ (15,648)																(15,648)
Dividends declared preferred shares	0
Other comprehensive income (loss), net of tax	0
Net Investment Income	205																205
Net realized gain on investments	14,767																14,767
Net unrealized depreciation on investments	(3,610)																(3,610)
Ending balance (in shares) at Sep. 30, 2022					24,425
Ending balance at Sep. 30, 2022	$ 391,799				$ 485						370,703						20,611
Beginning balance (in shares) at Dec. 31, 2022	24,609					24,609
Beginning balance at Dec. 31, 2022		$ 375,358				$ 492			$ 0			$ 354,243				$ 0		$ 20,623			$ 0
Beginning balance, preferred stock (in shares) at Dec. 31, 2022									0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in presentation			$ 1										$ 20,624						$ (20,623)
Removal of fair value adjustments			(138,043)										(138,043)
Consolidation of controlled investments				$ (64,970)						$ 245				$ (65,215)
Reassessment of deferred tax assets and liabilities			19,266										19,266
DRIP shares issued (in shares)							16
DRIP shares issued			$ 217										$ 217
Stock-based compensation expense, net of forfeitures	$ 2,015										2,015
Dividends declared related to RSA (in shares)					9
Dividends declared related to RSA, net of accrued dividends forfeited	0										137									$ (137)
Purchase of vested stock for employee payroll tax withholding (in shares)					(16)
Purchase of vested stock for employee payroll tax withholding	(534)				$ (1)						(533)
Issuance of stock (in shares)								20
Issuance of stock	$ 20,000							$ 20,000
Restricted stock awards (in shares)	27
Preferred stock issuance costs	$ (507)							(507)
Dividends declared common shares	(13,092)																			(13,092)
Dividends declared preferred shares	(1,049)																			(1,049)
Net income (loss)	28,545																			28,545
Other comprehensive income (loss), net of tax	$ (184)														$ (184)
Ending balance (in shares) at Sep. 30, 2023	24,645				24,645
Ending balance at Sep. 30, 2023	$ 227,023				$ 491			$ 19,738			192,711				(184)		0			14,267
Ending balance, preferred stock (in shares) at Sep. 30, 2023	20							20
Beginning balance (in shares) at Jun. 30, 2023					24,614
Beginning balance at Jun. 30, 2023	$ 221,215				$ 491			$ 19,738			192,114				(203)					9,075
Beginning balance, preferred stock (in shares) at Jun. 30, 2023								20
Increase (Decrease) in Stockholders' Equity [Roll Forward]
DRIP shares issued (in shares)					6
DRIP shares issued	71										71
Stock-based compensation expense, net of forfeitures	592										592
Dividends declared related to RSA (in shares)					2
Dividends declared related to RSA, net of accrued dividends forfeited	0										20									(20)
Purchase of vested stock for employee payroll tax withholding (in shares)					(4)
Purchase of vested stock for employee payroll tax withholding	$ (86)										(86)
Restricted stock awards (in shares)	27
Dividends declared common shares	$ (4,363)																			(4,363)
Dividends declared preferred shares	(400)																			(400)
Net income (loss)	9,975																			9,975
Other comprehensive income (loss), net of tax	$ 19														19
Ending balance (in shares) at Sep. 30, 2023	24,645				24,645
Ending balance at Sep. 30, 2023	$ 227,023				$ 491			$ 19,738			$ 192,711				$ (184)		$ 0			$ 14,267
Ending balance, preferred stock (in shares) at Sep. 30, 2023	20							20