Investments - Madison (Details) - Madison Paper Industries - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Schedule of Equity Method Investments [Line Items]
Revenues		$ 25,179
Costs and expenses:
Cost of sales		(48,935)
General and administrative		(63,101)
Operating Expenses		(112,036)
Operating loss		(86,857)
Other (expense)/income		1
Net loss		$ (86,856)
Subsequent Event
Schedule of Equity Method Investments [Line Items]
Revenues	$ 0
Costs and expenses:
Cost of sales	(1,054)
General and administrative	(26)
Operating Expenses	(1,080)
Operating loss	(1,080)
Other (expense)/income	(2)
Net loss	$ (1,082)