Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements Level 3 Inputs (Details)

v3.8.0.1
Fair Value Measurements Level 3 Inputs (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
$ / shares
Fair Value, Inputs, Level 3 [Member]  
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]  
Share Price | $ / shares $ 71.28
Fair Value Assumptions, Risk Free Interest Rate 2.08%
Fair Value Assumptions, Expected Volatility Rate 30.80%
Fair Value Inputs, Entity Credit Risk 5.63%
Three Point Seven Five Percentage Convertible Notes [Member]  
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]  
Embedded Derivative, Loss on Embedded Derivative | $ $ 13,826