How To Get Top 2 Rows For All Composite Key Combinations?

The requirement in to write a query which will return top 2 rows (in terms of lst_updt_timestamp column) for every combinations of cust_alias_nm, carrier_cd, acct_nbr columns.

Here I wrote a query which selects top 1 only.
Please help me to write to get the top 2nd along with the top 1st row.

select A.cust_alias_nm_id,
A.carrier_cd_id, A.acct_nbr_id,
sum(A.pd_clm_amt) clm_amt,
sum(A.pd_med_amt) med_amt,
sum(A.pd_exp_amt) exp_amt,
A.lst_updt_timestamp
from bal_load_stg A
group by A.cust_alias_nm_id, A.carrier_cd_id, A.acct_nbr_id, A.lst_updt_timestamp
having A.lst_updt_timestamp
in (
(select max(lst_updt_timestamp) from bal_load_stg B
where
A.cust_alias_nm_id = B.cust_alias_nm_id
and A.carrier_cd_id = B.carrier_cd_id
and A.acct_nbr_id = B.acct_nbr_id))


The output looks like:
cust_alias_nm_id carrier_cd_id acct_nbr_id clm_amt med_amt exp_amt lst_updt_timestamp
---------------- ------------- -------------- ---------------------------------------- ---------------------------------------- ---------------------------------------- ------------------------------------------------------
aaa 101 1234567891 500.00 500.00 500.00 2005-07-31 00:00:00.000
aaa 102 1234567891 500.00 500.00 500.00 2005-08-31 00:00:00.000
aaa 100 1234567890 700.00 700.00 700.00 2005-10-31 00:00:00.000


The desired output should look like:

cust_alias_nm carrier_cd acct_nbr clm_amt med_amt exp_amt lst_updt_timestamp
---------------- ------------- -------------- ---------------------------------------- ---------------------------------------- ----------------------------------------
aaa 100 1234567890 700.00 700.00 700.00 2005-10-31 00:00:00.000
aaa 100 1234567890 500.00 500.00 500.00 2005-08-31 00:00:00.000
aaa 102 1234567891 500.00 500.00 500.00 2005-08-31 00:00:00.000
aaa 101 1234567891 500.00 500.00 500.00 2005-07-31 00:00:00.000
aaa 101 1234567891 400.00 400.00 400.00 2005-05-31 00:00:00.000


All rows present in the table are
cust_alias_nm carrier_cd acct_nbr clm_amt med_amt exp_amt lst_updt_timestamp
---------------- ------------- -------------- ---------------------------------------- ---------------------------------------- ----------------------------------------
aaa 100 1234567890 700.00 700.00 700.00 2005-10-31 00:00:00.000
aaa 100 1234567890 500.00 500.00 500.00 2005-08-31 00:00:00.000
aaa 102 1234567891 500.00 500.00 500.00 2005-08-31 00:00:00.000
aaa 101 1234567891 500.00 500.00 500.00 2005-07-31 00:00:00.000
aaa 100 1234567890 400.00 400.00 400.00 2005-05-31 00:00:00.000
aaa 101 1234567891 400.00 400.00 400.00 2005-05-31 00:00:00.000





Thanks in advance.