PROPERTY AND EQUIPMENT: (Details) (USD $)	12 Months Ended
Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Property and Equipment
Property and equipment, gross	$ 913,073,000	$ 886,967,000
Less accumulated depreciation and amortization	659,700,000	632,297,000
Property and equipment, net	253,373,000	254,670,000
Depreciation expense on property and equipment	62,400,000	64,100,000	60,700,000
Land
Property and Equipment
Property and equipment, gross	6,737,000	6,737,000
Buildings and improvements
Property and Equipment
Property and equipment, gross	263,115,000	250,065,000
Data processing equipment
Property and Equipment
Property and equipment, gross	583,696,000	566,197,000
Office furniture and other equipment
Property and Equipment
Property and equipment, gross	$ 59,525,000	$ 63,968,000

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.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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- Definition

Gross amount, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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- Definition

Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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