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Revenue Commission Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Advisory Revenue, Percent of Underlying Assets	1.00%
Commission Revenues	$ 4,505,072	$ 3,305,487	$ 2,552,623
Annuities [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	2,679,752	1,949,343	1,482,690
Mutual Funds [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	986,441	799,952	666,942
Fixed Income [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	256,520	216,872	154,177
Equities [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	202,984	152,500	110,698
Other [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	379,375	186,820	138,116
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	2,645,913	1,763,232	1,252,783
Transferred at Point in Time [Member] | Annuities [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	1,633,309	1,069,811	739,760
Transferred at Point in Time [Member] | Mutual Funds [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	220,251	181,695	145,642
Transferred at Point in Time [Member] | Fixed Income [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	256,520	216,872	154,177
Transferred at Point in Time [Member] | Equities [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	202,984	152,500	110,698
Transferred at Point in Time [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	332,849	142,354	102,506
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	1,859,159	1,542,255	1,299,840
Transferred over Time [Member] | Annuities [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	1,046,443	879,532	742,930
Transferred over Time [Member] | Mutual Funds [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	766,190	618,257	521,300
Transferred over Time [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Commission Revenues	$ 46,526	$ 44,466	$ 35,610

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Amount of commission revenue from buying and selling securities on behalf of customers.

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