Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance			$ (36,300)	$ 6,000
Operating loss carryforwards expired during period			38,800
Deferred tax assets, net	$ 0		0	2,640
NOL carry forwards, federal	182,500		182,500
NOL carry forwards, state	97,100		97,100
NOL carry forwards, foreign	97,400		97,400
NOL carry forwards increase, federal			2,800
NOL carry forwards increase, state			3,600
Federal capital loss carryforward utilized during period			11,700
State capital loss carryforward utilized during period			3,000
Capital loss carryforwards	0		0	38,755
Undistributed earnings of foreign subsidiaries	3,500		3,500
Income tax netted from Income from Discontinued Operations			1,311	2,430	$ 1,542
Israel Tax Authority
Operating Loss Carryforwards [Line Items]
Deferred tax assets, net				2,600
Federal
Operating Loss Carryforwards [Line Items]
Capital loss carryforwards	98,800		98,800
State
Operating Loss Carryforwards [Line Items]
Capital loss carryforwards	21,000		21,000
Tecnonet
Operating Loss Carryforwards [Line Items]
Increase (decrease) in valuation allowance	(8,700)	$ 8,700
Provision for deferred taxes related to foreign earnings	$ 0	$ 8,700	0
Income tax netted from Income from Discontinued Operations			$ 1,311	$ 2,430	$ 1,542