Annual report pursuant to Section 13 and 15(d)

Employee Benefits (Details)

v3.6.0.2
Employee Benefits (Details)
shares in Thousands, $ in Thousands
 1 Months Ended 12 Months Ended
Mar. 31, 2016
shares
Mar. 31, 2015
shares
Dec. 31, 2016
USD ($)
Plan
Jan. 02, 2016
USD ($)
Dec. 27, 2014
USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Number of defined contribution retirement plans | Plan     2    
Defined Contribution Plan, Employer Discretionary Contribution Amount     $ 1,938 $ 2,757 $ 4,325
Defined Contribution Benefit Plan Supplemental Pension Benefits Amount     $ 369 416 415
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent     100.00%    
Defined Benefit Plan Percentage of Employer Contribution Equal to Wages     2.00%    
Employee Stock Ownership Plan (ESOP), Shares Contributed to ESOP | shares 44,509 82,269      
Employee Stock Ownership Plan (ESOP), Compensation Expense     $ 567 1,432 3,021
Defined Benefit Contribution Plan Foreign Operations Expenses Recognized     199 336 673
Defined Benefit Plan Compensation Expense     $ 10 $ 17 $ 35
United Kingdom [Member]          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Stock Issued During Period, Shares, Employee Stock Ownership Plan | shares 3,547 5,516      
Germany [Member]          
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]          
Stock Issued During Period, Shares, Employee Stock Ownership Plan | shares 2,561 4,504