Reclassification of Prior Periods (Notes)

12 Months Ended

Mar. 31, 2014

Accounting Changes and Error Corrections [Abstract]

Reclassifications of Prior Periods [Text Block]

RECLASSIFICATION OF PRIOR PERIODS

In the quarter ended December 31, 2013, the Company identified an error to the presentation on its consolidated statements of cash flows of the amortization of premium of available-for-sale investments. The Company previously included the amortization of the premium as an investing activity. This amortization is a non-cash expense that should be recorded in the adjustments to reconcile net income to net cash provided by operating activities. The Company has corrected this error in the current period, and has conformed previous periods to the current presentation. Based on the Company's evaluation of relevant quantitative and qualitative factors, it determined that the classification errors are immaterial to the prior period financial statements and the Company plans to correct the comparative presentation of the prior periods in future filings. The effect on net cash provided by operating activities and net cash used in investing activities for the previous periods covered by this report are shown below (amounts in thousands):

	Year ended
	March 31, 2013
	As Reported			Adjustment			As Adjusted
Cash flows from operating activities
Amortization of premium on available-for-sale investments	$	—		$	13,186		$	13,186
Net cash provided by operating activities	446,179			13,186			459,365
Cash flows from investing activities
Purchases of available-for-sale investments	(985,791		)	(13,186		)	(998,977		)
Net cash used in investing activities	(936,756		)	(13,186		)	(949,942		)
	Year ended
	March 31, 2012
	As Reported			Adjustment			As Adjusted
Cash flows from operating activities
Amortization of premium on available-for-sale investments	$	—		$	15,520		$	15,520
Net cash provided by operating activities	396,458			15,520			411,978
Cash flows from investing activities
Purchases of available-for-sale investments	(1,133,625		)	(15,520		)	(1,149,145		)
Net cash used in investing activities	(256,482		)	(15,520		)	(272,002		)

This correction does not affect the Company's consolidated statements of income, consolidated balance sheets, consolidated statements of comprehensive income or consolidated statements of stockholders' equity for any periods.