Stockholders' Equity Narrative (Details) shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) shares
Class of Stock [Line Items]
Stock Issued During Period, Shares, New Issues | $	$ 86
Adjustments to Additional Paid in Capital, Other | $	$ 16,543
Convertible Notes Due in 2017 [Member]
Class of Stock [Line Items]
Debt Conversion, Converted Instrument, Shares Issued | shares	7,863
Convertible Notes Due in 2019 [Member]
Class of Stock [Line Items]
Debt Conversion, Converted Instrument, Shares Issued | shares	713