Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Net Proceeds From All Sources (Parentheticals)

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Consolidated Statements of Net Proceeds From All Sources (Parentheticals) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss)      
Other comprehensive income (loss), defined benefit plan, transition asset (obligation), reclassification adjustment from AOCI, tax $ (101) $ (24) $ 84
Net Proceeds From All Sources      
Dividends paid - per Sub-share (in dollars per share) $ 1.75 $ 1.05 $ 0.35
Special dividends paid per Sub-share Certificate (in dollars per share) $ 4.25 $ 3.00 $ 1.00