Income Taxes -Components Of Income Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Components of loss before income taxes and the provision for income taxes
Loss before income taxes	$ (55,690)	$ (88,813)	$ (63,080)
Income tax benefit		325	410
Net loss attributable to the Company	(55,690)	(88,488)	(62,670)
significant components deferred income tax (benefit) expense
Deferred tax (benefit) expense	(13,344)	(4,088)	(1,803)
Net operating loss carryforward (generated) expired	(7,450)	(8,349)	(6,551)
Valuation allowance increase (decrease)	20,794	12,437	8,354
Provision for income taxes		(325)	(410)
U.S.
Components of loss before income taxes and the provision for income taxes
Loss before income taxes	(54,921)	(87,459)	(61,730)
Net loss attributable to the Company	(54,921)	(87,459)	(61,730)
significant components deferred income tax (benefit) expense
Deferred tax (benefit) expense	(14,237)	(4,282)	(3,209)
Net operating loss carryforward (generated) expired	(8,345)	(8,974)	(6,536)
Valuation allowance increase (decrease)	22,582	13,256	9,745
Foreign
Components of loss before income taxes and the provision for income taxes
Loss before income taxes	(769)	(1,354)	(1,350)
Income tax benefit		325	410
Net loss attributable to the Company	(769)	(1,029)	(940)
significant components deferred income tax (benefit) expense
Deferred tax (benefit) expense	893	194	1,406
Net operating loss carryforward (generated) expired	895	625	(15)
Valuation allowance increase (decrease)	$ (1,788)	$ (819)	$ (1,391)