Regulatory Requirements - HRB Bank (HRB Bank's Regulatory Capital Requirements) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012		Mar. 31, 2012		Oct. 31, 2012 HRB Bank [Member]	Oct. 31, 2012 OCC [Member]
Total risk-based capital ratio, amount	$ 462,454	[1]	$ 458,860	[1]
Total risk-based capital ratio	128.20%	[1]	120.30%	[1]
Total risk-based capital ratio, minimum capital requirement, amount	28,868	[1]	30,513	[1]
Total risk-based capital ratio, minimum capital requirement	8.00%	[1]	8.00%	[1]
Total risk-based capital ratio, minimum to be well capitalized, amount	36,085	[1]	38,141	[1]
Total risk-based capital ratio, minimum to be well capitalized	10.00%	[1]	10.00%	[1]
Tier 1 risk-based capital ratio, amount	457,760	[2]	453,800	[2]
Tier 1 risk-based capital ratio	126.90%	[2]	119.00%	[2]
Tier 1 risk-based capital ratio, minimum to be well capitalized, amount	21,651	[2]	22,885	[2]
Tier 1 risk-based capital ratio, minimum to be well capitalized	6.00%	[2]	6.00%	[2]
Tier 1 capital ratio (leverage), amount	457,760	[3]	453,800	[3]
Tier 1 capital ratio (leverage)	36.80%	[3]	29.40%	[3]
Tier 1 capital ratio (leverage), minimum capital requirement, amount	49,696	[3]	185,252	[3]
Tier 1 capital ratio (leverage), minimum capital requirement	4.00%	[3],[4]	12.00%	[3]	12.00%	4.00%
Tier 1 capital ratio (leverage), minimum to be well capitalized, amount	62,120	[3]	77,188	[3]
Tier 1 capital ratio (leverage), minimum to be well capitalized	5.00%	[3]	5.00%	[3]
Tangible equity ratio, amount	457,760	[5]	453,800	[5]
Tangible equity ratio	36.80%	[5]	29.40%	[5]
Tangible equity ratio, minimum capital requirement, amount	$ 18,636	[5]	$ 23,157	[5]
Tangible equity ratio, minimum capital requirement	1.50%	[5]	1.50%	[5]

[1] Total risk-based capital divided by risk-weighted assets.

[2] Tier 1 (core) capital less deduction for low-level recourse and residual interest divided by risk-weighted assets.

[3] Tier 1 (core) capital divided by adjusted total assets.

[4] Effective April 5, 2012, the minimum capital requirement was changed to 4% by the OCC, although HRB Bank plans to maintain a minimum of 12.0% leverage capital at the end of each calendar quarter.

[5] Tangible capital divided by tangible assets.