Note 6. Acquisition and Deconsolidation of Subsidiaries: Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - GAF Acquiree Member $ in Thousands	Apr. 30, 2015 USD ($)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	$ 836
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	5,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other	1,249
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	7,585
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	4,849
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	2,200
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	3,326
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	10,375
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	$ (2,790)