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Income Taxes (Details 4) - USD ($) $ in Thousands	3 Months Ended
Income Taxes (Details 4) - USD ($) $ in Thousands	Dec. 31, 2015	Nov. 03, 2015	Dec. 31, 2014
Operating Loss Carryforwards
Alternative minimum tax credit carryforwards	$ 1,496		$ 5,685
Valuation allowances	633		$ 633
Change in income tax provision	86,000
Spin-off
Operating Loss Carryforwards
Foreign tax credit carryforwards		$ 144,300
Domestic
Operating Loss Carryforwards
Operating loss carryforwards	22,000
State
Operating Loss Carryforwards
Operating loss carryforwards	6,700
Foreign
Operating Loss Carryforwards
Change in valuation allowance for deferred tax asset	(48,200)
Valuation allowances	$ 37,800