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Share Compensation Plans (Compensation Expense of Nonvested Shares) (Details)
$ in Thousands
Jun. 30, 2016
USD ($)
Nonvested time-based shares [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Remaining 2016 $ 1,106
2017 1,203
2018 583
2019 3
Total 2,895
Nonvested performance-based shares [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Remaining 2016 1,158
2017 1,611
2018 757
2019 0
Total $ 3,526