XML 76 R61.htm IDEA: XBRL DOCUMENT v3.7.0.1
EMPLOYEE BENEFIT PLANS (Details) - USD ($)
 3 Months Ended 6 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2015
Mar. 31, 2017
Mar. 31, 2016
Components of net periodic cost          
Discretionary contribution     $ 30,000,000 $ 0  
Pension          
Components of net periodic cost          
Service cost $ 2,087,000 $ 1,898,000   4,174,000 $ 3,796,000
Interest cost 2,442,000 2,835,000   4,885,000 5,671,000
Expected return on plan assets (4,828,000) (5,030,000)   (9,656,000) (10,059,000)
Recognized actuarial loss 2,206,000 1,821,000   4,413,000 3,641,000
Prior service cost amortization 28,000 27,000   55,000 55,000
Net periodic benefit cost 1,935,000 1,551,000   3,871,000 3,104,000
OPEB          
Components of net periodic cost          
Service cost 1,095,000 1,131,000   2,190,000 2,261,000
Interest cost 1,387,000 1,564,000   2,773,000 3,128,000
Expected return on plan assets (1,191,000) (1,211,000)   (2,383,000) (2,422,000)
Recognized actuarial loss 1,092,000 818,000   2,185,000 1,637,000
Prior service cost amortization (91,000) (91,000)   (182,000) (182,000)
Net periodic benefit cost $ 2,292,000 $ 2,211,000   $ 4,583,000 $ 4,422,000