Business Combinations and Dispositions (Details 1) - USD ($) $ in Thousands	Dec. 31, 2015	Mar. 31, 2015	Mar. 11, 2015
Fair value of identifiable intangible assets acquired:
Goodwill	$ 73,513	$ 73,571
Gennius [Member]
Fair value of the net tangible assets acquired and liabilities assumed:
Other assets			$ 4
Deferred revenues			(37)
Other liabilities			(131)
Total net tangible assets acquired and liabilities assumed			(164)
Fair value of identifiable intangible assets acquired:
Goodwill			709
Total identifiable intangible assets acquired			2,509
Total purchase price			2,345
Gennius [Member] | Software Technology [Member]
Fair value of identifiable intangible assets acquired:
Software technology			$ 1,800