Net Income (Loss) Per Share Net Income (Loss) Per Share (Details 1) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jun. 23, 2015
Debt Instrument [Line Items]
Proceeds from Issuance of Common Stock, Gross	$ 75,000	$ 200,000
Stock Issued During Period, Shares, New Issues	9,253,016	17,691,094
Proceeds from Issuance of Common Stock			$ 269,556	$ 0	$ 0
Term Loan due 2020 [Member] | Secured Debt [Member]
Debt Instrument [Line Items]
Long-term Debt						$ 100,000