EMPLOYEE BENEFIT PLANS - DEFINED BENEFIT PLANS (Details) - USD ($) |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2015 |
Jun. 30, 2014 |
Jun. 30, 2015 |
Jun. 30, 2014 |
|
Components of net periodic cost | ||||
Defined benefit plan, contributions by employer | $ 0 | $ 0 | ||
Pension [Member] | ||||
Components of net periodic cost | ||||
Service cost | $ 1,872,000 | $ 1,536,000 | 5,614,000 | 4,608,000 |
Interest cost | 2,549,000 | 2,517,000 | 7,649,000 | 7,550,000 |
Expected return on plan assets | (4,272,000) | (3,869,000) | (12,817,000) | (11,607,000) |
Recognized actuarial loss | 1,747,000 | 1,399,000 | 5,239,000 | 4,197,000 |
Prior service cost amortization | 28,000 | 27,000 | 83,000 | 83,000 |
Recognized net initial obligation | 0 | 0 | 0 | 0 |
Net periodic benefit cost | 1,924,000 | 1,610,000 | 5,768,000 | 4,831,000 |
OPEB [Member] | ||||
Components of net periodic cost | ||||
Service cost | 1,063,000 | 980,000 | 3,190,000 | 2,942,000 |
Interest cost | 1,434,000 | 1,434,000 | 4,304,000 | 4,300,000 |
Expected return on plan assets | (1,245,000) | (1,043,000) | (3,733,000) | (3,130,000) |
Recognized actuarial loss | 737,000 | 625,000 | 2,208,000 | 1,875,000 |
Prior service cost amortization | (91,000) | (89,000) | (273,000) | (267,000) |
Recognized net initial obligation | 0 | 3,000 | 0 | 8,000 |
Net periodic benefit cost | $ 1,898,000 | $ 1,910,000 | $ 5,696,000 | $ 5,728,000 |