Equity (Details 2) - USD ($) shares in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Summary of stock options outstanding
Stock Options Outstanding, Beginning Balance	82	57
Stock Options, Granted		29
Stock Options, Exercised
Stock Options, Forfeited, or expired	(7)
Stock Options Outstanding, Ending Balance	75	85
Stock Options, Vested and expected to vest at ending balance	72	83
Options exercisable	59	47
Weighted Average Exercise Price, Beginning Period	$ 45.35	$ 56.20
Weighted Average Exercise Price, Granted		$ 28.20
Weighted Average Exercise Price, Forfeited, or expired	$ 40.51
Weighted Average Exercise Price, Ending Period	45.84	$ 46.90
Weighted Average Exercise Price, Vested and expected to vest at ending balance	46.42	47.40
Weighted Average Exercise Price, Exercisable at ending balance	$ 52.16	$ 57.70
Weighted Average Remaining Contractual Term, ending balance	3 years 10 months 9 days	4 years 10 months 13 days
Weighted Average Remaining Contractual Term, vested and expected to vest at ending balance	3 years 9 months 18 days	4 years 9 months 26 days
Weighted Average Remaining Contractual Term, excercisable at ending balance	3 years 2 months 15 days	3 years 8 months 1 day
Aggregate Intrinsic Value, Beginning Balance
Aggregate Intrinsic Value, Granted
Aggregate Intrinsic Value, Exercised
Aggregate Intrinsic Value, Forfeited or expired
Aggregate Intrinsic Value, Ending Balance