Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Mar. 31, 2012
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 396,679	$ 347,931
Less accumulated depreciation and amortization	(172,653)	(143,658)
Net property and equipment	224,026	204,273
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	25,181	23,340
Office furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	174,030	146,924
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	2,269	2,286
Signs [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	18,946	16,969
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	172,252	146,983
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Gross property and equipment	$ 4,001	$ 11,429

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

+ References+ Details

Gross amount of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details

- Definition

Amount, net of accumulated depreciation, depletion and amortization, of long-lived physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References+ Details