Regulatory Capital Requirements Of HRB Bank (HRB Bank's Regulatory Capital Requirements) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2013	Mar. 31, 2013		Apr. 05, 2012	Mar. 31, 2012
Banking and Thrift [Abstract]
Total risk-based capital ratio, Amount		$ 506,734	[1]		$ 458,860	[1]
Total risk-based capital ratio		131.60%	[1]		120.30%	[1]
Total risk-based capital ratio, Minimum Capital Requirement, Amount		30,806	[1]		30,513	[1]
Total risk-based capital ratio, Minimum Capital Requirement, Ratio		8.00%	[1]		8.00%	[1]
Total risk-based capital ratio, Minimum to be Well Capitalized, Amount		38,508	[1]		38,141	[1]
Total risk-based capital ratio, Minimum to be Well Capitalized, Ratio		10.00%	[1]		10.00%	[1]
Tier 1 risk-based capital ratio, Amount		501,731	[2]		453,800	[2]
Tier 1 risk-based capital ratio		130.30%	[2]		119.00%	[2]
Tier 1 risk-based capital ratio, Minimum to be Well Capitalized, Amount		23,105	[2]		22,885	[2]
Tier 1 risk-based capital ratio, Minimum to be Well Capitalized, Ratio		6.00%	[2]		6.00%	[2]
Tier 1 capital ratio (leverage), Amount		501,731	[3]		453,800	[3]
Tier 1 capital ratio (leverage)		25.50%	[3]		29.40%	[3]
Tier 1 capital ratio (leverage), Minimum Capital Requirement, Amount		236,315	[3]		185,252	[3]
Tier 1 capital ratio (leverage), Minimum Capital Requirement, Ratio		12.00%	[3],[4]	4.00%	12.00%	[3]
Tier 1 capital ratio (leverage), Minimum to be Well Capitalized, Amount		98,464	[3]		77,188	[3]
Tier 1 capital ratio (leverage), Minimum to be Well Capitalized, Ratio		5.00%	[3]		5.00%	[3]
Tangible equity ratio, Amount		501,731	[5]		453,800	[5]
Tangible equity ratio		25.50%	[5]		29.40%	[5]
Tangible equity ratio, Minimum Capital Requirement, Amount		$ 29,539	[5]		$ 23,157	[5]
Tangible equity ratio, Minimum Capital Requirement, Ratio		1.50%	[5]		1.50%	[5]
Minimum leverage capital per calendar quarter	12.00%

[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.