Regulatory Capital Requirements (Narrative) (Details)	Dec. 31, 2014		Mar. 31, 2014		Sep. 30, 2013		Jan. 31, 2015
Assets Sold under Agreements to Repurchase [Line Items]
Tier 1 capital ratio (leverage)	49.60%	[1]	32.10%	[1]	37.10%	[1]
HRB Bank [Member]
Assets Sold under Agreements to Repurchase [Line Items]
Tier 1 capital ratio (leverage)							31.20%

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