INCOME TAXES: (Details 2) (USD $)	Mar. 31, 2014	Mar. 31, 2013
INCOME TAXES:
Undistributed earnings of foreign subsidiaries that are indefinitely reinvested	$ 30,700,000
Deferred tax assets:
Accrued expenses not currently deductible for tax purposes	10,606,000	9,183,000
Revenue recognized for tax purposes in excess of revenue for financial reporting purposes	3,859,000	4,314,000
Net operating loss and tax credit carryforwards	43,568,000	45,746,000
Other	10,411,000	11,945,000
Total deferred tax assets	68,444,000	71,188,000
Less valuation allowance	43,436,000	35,981,000
Net deferred tax assets	25,008,000	35,207,000
Deferred tax liabilities:
Intangible assets, principally due to differences in amortization	(70,892,000)	(66,959,000)
Costs capitalized for financial reporting purposes in excess of amounts capitalized for tax purposes	(20,398,000)	(24,869,000)
Property and equipment, principally due to differences in depreciation	(11,074,000)	(17,702,000)
Total deferred tax liabilities	(102,364,000)	(109,530,000)
Net deferred tax liability	$ (77,356,000)	$ (74,323,000)