DISCONTINUED OPERATIONS: - U.K. Call Center Operation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Summary results of operations
Income taxes									$ 3,598	$ 11,973	$ 17,587
Earnings (loss) from discontinued operations, net of tax	$ 111	$ (971)	$ 12,068	$ 4,143	$ 2,998	$ 3,819	$ 5,557	$ 3,137	15,351	15,511	26,143
Carrying amounts of the major classes of assets and liabilities
Assets from discontinued operations					172,284					172,284
Liabilities from discontinued operations					57,433					57,433
U.K. call center operation, 2 Touch | Discontinued operations, held-for-sale or disposed of by sale
Summary results of operations
Revenues										8,484
Earnings (loss) from discontinued operations before income taxes										4
Loss on sale of discontinued operations before income taxes										(1,888)
Earnings (loss) from discontinued operations, net of tax										(1,884)
U.K. call center operation, 2 Touch | Discontinued operations held-for-sale
Summary results of operations
Revenues											35,267
Earnings (loss) from discontinued operations before income taxes											(2,189)
Earnings (loss) from discontinued operations, net of tax											$ (2,189)
U.K. call center operation, 2 Touch | Discontinued operations sold
Summary results of operations
Earnings (loss) from discontinued operations before income taxes									(450)
Earnings (loss) from discontinued operations, net of tax									$ (450)
Carrying amounts of the major classes of assets and liabilities
Trade accounts receivable, net					112					112
Assets from discontinued operations					112					112
Other accrued expenses					1,008					1,008
Liabilities from discontinued operations					$ 1,008					$ 1,008