Income Taxes Rollforward of valuation allowance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of year	$ 63,955
Balance, end of year	79,908	$ 63,955
Domestic Tax Authority [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of year	55,474	0	$ 0
Balance, end of year	69,683	55,474	0
Foreign Tax Authority
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance, beginning of year	8,481	4,888	0
Balance, end of year	10,225	8,481	4,888
Tax provision [Domain] | Domestic Tax Authority [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	18,906	55,474	0
Tax provision [Domain] | Foreign Tax Authority
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	2,446	4,146	4,888
Tax provision discontinued operations and other comprehensive income [Domain] | Domestic Tax Authority [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	(4,697)	0	0
Foreign Currency Gain (Loss) [Member] | Foreign Tax Authority
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ (702)	$ (553)	$ 0