Stockholders' Equity - Repurchase activity (Details)	3 Months Ended												36 Months Ended
Stockholders' Equity - Repurchase activity (Details)	Mar. 31, 2026 USD ($) shares	Dec. 31, 2025 USD ($) $ / shares shares	Sep. 30, 2025 USD ($) $ / shares shares	Jun. 30, 2025 USD ($) $ / shares shares	Mar. 31, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) $ / shares shares	Sep. 30, 2024 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) $ / shares shares	Mar. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Sep. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2023 USD ($) $ / shares shares	Mar. 31, 2026 shares
Class of Stock
Repurchase of common stock \| $	$ 205,820				$ 204,863
Class K Common Stock
Class of Stock
Number of Share Repurchases Requested	70,588	78,008	40,889	32,542	20,042	42,948	40,088	142,529	56,794	52,823	10,274	59,587
Shares Repurchased		9,057	6,656	12,746	4,842	1,037	230	19,615	9,864	10,801	3,097	16,090
Amount of Shares Repurchased \| $		$ 92,114	$ 67,696	$ 129,628	$ 49,241	$ 10,511	$ 2,338	$ 199,490	$ 113,731	$ 124,535	$ 35,704	$ 184,422
Repurchase of common stock \| $	$ 194,074				$ 204,863
Average Amount per share \| $ / shares		$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 11.53	$ 11.53	$ 11.53	$ 11.46
Requests Withdrawn				9,757
Repurchase Requests Outstanding	70,588	68,951											409,184
Number of outstanding and unfulfilled repurchase request	115												115
Class K Common Stock \| One hundred and fifteen unfilled standard repurchase requests
Class of Stock
Repurchase Requests Outstanding	409,184				297,421
Class K One Common Stock
Class of Stock
Shares Repurchased			1,225	463	370	1,020	265	19,258	1,129	4,118	1,099	13,110
Amount of Shares Repurchased \| $			$ 12,452	$ 4,712	$ 3,762	$ 10,373	$ 2,693	$ 195,853	$ 11,485	$ 47,486	$ 12,675	$ 149,824
Average Amount per share \| $ / shares			$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 11.53	$ 11.53	$ 11.43
Requests Withdrawn						4,896
Repurchase Requests Outstanding			33,008
Class K Two Common Stock
Class of Stock
Shares Repurchased				342	685	1,662	1,946	19,879	891	912	596	4,654
Amount of Shares Repurchased \| $				$ 3,483	$ 6,961	$ 16,896	$ 19,786	$ 202,170	$ 9,062	$ 9,276	$ 6,868	$ 53,189
Average Amount per share \| $ / shares				$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 11.53	$ 11.43
Requests Withdrawn								2,457	9,183
Repurchase Requests Outstanding				9,234
Class K Three Common Stock
Class of Stock
Shares Repurchased					506	1,228	916	8,921	1,649	900	132	2,531
Amount of Shares Repurchased \| $					$ 5,145	$ 12,487	$ 9,318	$ 90,730	$ 16,770	$ 9,155	$ 1,341	$ 29,078
Average Amount per share \| $ / shares					$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 11.49
Requests Withdrawn									1,366
Repurchase Requests Outstanding					13,639	33,105
Class K Four Common Stock
Class of Stock
Shares Repurchased							1,695	1,762	1,170	1,665	130	559
Amount of Shares Repurchased \| $							$ 17,241	$ 17,919	$ 11,898	$ 16,942	$ 1,324	$ 5,678
Average Amount per share \| $ / shares							$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17	$ 10.17
Requests Withdrawn									658
Repurchase Requests Outstanding									30,884
Class K Five Common Stock
Class of Stock
Shares Repurchased							1,253	3,260		983	241	535
Amount of Shares Repurchased \| $							$ 12,743	$ 33,157		$ 9,998	$ 2,451	$ 5,438
Average Amount per share \| $ / shares							$ 10.17	$ 10.17		$ 10.17	$ 10.17	$ 10.17
Requests Withdrawn										6,937		671
Repurchase Requests Outstanding							33,783			26,507
Class K Six Common Stock
Class of Stock
Shares Repurchased								2,410			178	989
Amount of Shares Repurchased \| $								$ 24,506			$ 1,811	$ 10,062
Average Amount per share \| $ / shares								$ 10.17			$ 10.17	$ 10.17
Repurchase Requests Outstanding								64,967			4,801
Class K Seven Common Stock
Class of Stock
Shares Repurchased												731
Amount of Shares Repurchased \| $												$ 7,437
Average Amount per share \| $ / shares												$ 10.17
Repurchase Requests Outstanding												19,717
Class K-I Common Stock
Class of Stock
Number of Share Repurchases Requested						18,240			1,613	1,595		5,591
Shares Repurchased						439			158	244		1,101
Amount of Shares Repurchased \| $						$ 4,464			$ 1,823	$ 2,675		$ 12,625
Repurchase of common stock \| $	$ 11,746				$ 0
Average Amount per share \| $ / shares						$ 10.17			$ 11.53	$ 10.96		$ 11.47
Requests Withdrawn												1,036
Number of outstanding and unfulfilled repurchase request	80												80
Class K-I Common Stock \| Eighty unfilled standard repurchase requests
Class of Stock
Repurchase Requests Outstanding	35,144				27,749
Class K-I One Common Stock
Class of Stock
Shares Repurchased					119				35	140		1,041
Amount of Shares Repurchased \| $					$ 1,207				$ 356	$ 1,526		$ 12,003
Average Amount per share \| $ / shares					$ 10.17				$ 10.17	$ 10.9		$ 11.53
Class K-I Two Common Stock
Class of Stock
Shares Repurchased					220	801				30		370
Amount of Shares Repurchased \| $					$ 2,234	$ 8,152				$ 296		$ 4,261
Average Amount per share \| $ / shares					$ 10.17	$ 10.17				$ 9.92		$ 11.52
Requests Withdrawn									1,420
Class K-I Three Common Stock
Class of Stock
Shares Repurchased										29		200
Amount of Shares Repurchased \| $										$ 292		$ 2,309
Average Amount per share \| $ / shares										$ 10.17		$ 11.55
Class K-I Four Common Stock
Class of Stock
Shares Repurchased										53		44
Amount of Shares Repurchased \| $										$ 541		$ 451
Average Amount per share \| $ / shares										$ 10.17		$ 10.17
Class K-I Five Common Stock
Class of Stock
Shares Repurchased												44
Amount of Shares Repurchased \| $												$ 445
Average Amount per share \| $ / shares												$ 10.17
Class K-I Six Common Stock
Class of Stock
Shares Repurchased												81
Amount of Shares Repurchased \| $												$ 824
Average Amount per share \| $ / shares												$ 10.17