Regulatory Requirements (HRB Bank's Regulatory Capital Requirements) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2011		Mar. 31, 2011
Regulatory Requirements [Abstract]
Total risk-based capital ratio, amount	$ 409,193	[1]	$ 405,000	[1]
Total risk-based capital ratio	97.10%	[1]	92.50%	[1]
Total risk-based capital ratio, for capital adequacy purposes, amount	33,715	[1]	35,019	[1]
Total risk-based capital ratio, for capital adequacy	8.00%	[1]	8.00%	[1]
Total risk-based capital ratio, to be well capitalized, amount	42,144	[1]	43,773	[1]
Total risk-based capital ratio, to be well capitalized	10.00%	[1]	10.00%	[1]
Tier 1 risk-based capital ratio, amount	403,638	[2]	399,187	[2]
Tier 1 risk-based capital ratio	95.80%	[2]	91.20%	[2]
Tier 1 risk-based capital ratio, to be well capitalized, amount	25,287	[2]	26,264	[2]
Tier 1 risk-based capital ratio, to be well capitalized	6.00%	[2]	6.00%	[2]
Tier 1 capital ratio (leverage), amount	403,638	[3]	399,187	[3]
Tier 1 capital ratio (leverage)	35.60%	[3]	22.80%	[3]
Tier 1 capital ratio (leverage), for capital adequacy, amount	136,150	[3]	209,758	[3]
Tier 1 capital ratio (leverage), for capital adequacy	12.00%	[3]	12.00%	[3]
Tier 1 capital ratio (leverage), to be well capitalized, amount	56,729	[3]	87,399	[3]
Tier 1 capital ratio (leverage), to be well capitalized	5.00%	[3]	5.00%	[3]
Tangible equity ratio, amount	403,638	[4]	399,187	[4]
Tangible equity ratio	35.60%	[4]	22.80%	[4]
Tangible equity ratio, for capital adequacy, amount	$ 17,019	[4]	$ 26,220	[4]
Tangible equity ratio, for capital adequacy	1.50%	[4]	1.50%	[4]

[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] Tangible capital divided by tangible assets.