Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation (Unrecognized Compensation Expense Expected to be Recognized in Future Periods) (Details)

v3.3.1.900
Share-Based Compensation (Unrecognized Compensation Expense Expected to be Recognized in Future Periods) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
RSU RSU equity awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Nonvested awards, total compensation cost not yet recognized, share-based awards other than options $ 5,208 $ 3,979 $ 5,331
Cash-settleable RSU awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Nonvested awards, total compensation cost not yet recognized, share-based awards other than options $ 4,728 $ 4,977 $ 7,669