Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Net Proceeds From All Sources

v3.8.0.1
Consolidated Statements of Net Proceeds From All Sources - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Sub-Share Certificates of Proprietary Interest, Per Share [Member]              
Balances (in shares)   7,927,314   8,118,064 7,927,314 8,118,064 8,322,399
Cost of Sub-share Certificates in Certificates of Proprietary Interest purchased and cancelled (in shares)         (105,715) (190,750) (204,335)
Balances (in shares) 7,821,599   7,927,314   7,821,599 7,927,314 8,118,064
AOCI Attributable to Parent [Member]              
Balances   $ (960)   $ (1,249) $ (960) $ (1,249) $ (1,353)
Periodic pension costs, net of income taxes         156 289 104
Cost of Sub-share Certificates in Certificates of Proprietary Interest purchased and cancelled            
Balances $ (804)   $ (960)   (804) (960) (1,249)
Net Proceeds From All Sources [Member]              
Balances   48,584   46,936 48,584 46,936 28,070
Net income         76,361 37,240 50,039
Cost of Sub-share Certificates in Certificates of Proprietary Interest purchased and cancelled         (34,267) (33,085) (28,770)
Dividends paid         (2,769) (2,507) (2,403)
Special dividends paid - $1.00 per Sub-share Certificate         (7,912)    
Balances 79,997   48,584   79,997 48,584 46,936
Balances   47,624   45,687 47,624 45,687 26,717
Net income 18,361 $ 14,885 10,907 $ 7,280 76,361 37,240 50,039
Periodic pension costs, net of income taxes         156 289 104
Cost of Sub-share Certificates in Certificates of Proprietary Interest purchased and cancelled         (34,267) (33,085) (28,770)
Dividends paid         (2,769) (2,507) (2,403)
Special dividends paid - $1.00 per Sub-share Certificate         (7,912)    
Balances $ 79,193   $ 47,624   $ 79,193 $ 47,624 $ 45,687