Note 11. Income Taxes (Details) - USD ($) $ in Thousands		Jun. 30, 2015	Apr. 30, 2015	Dec. 31, 2014
Operating Loss Carryforwards	[1]	$ 262,189
Net deferred tax asset		$ 8,966		$ 12,025
GAF Acquiree Member
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent			$ 2,200

[1] Expires in varying amounts through the year 2028 with a significant portion expiring in 2020.