Fair Value Disclosures Disclosures related to our financial assets (Details) (Fixed Income Securities [Member], Fair Value, Inputs, Level 1 [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Mar. 31, 2014
Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale marketable securities	$ 12,868	$ 16,868