XML 63 R51.htm IDEA: XBRL DOCUMENT v3.5.0.2
BENEFIT PLANS (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Pension Benefits [Member]        
Net periodic benefit cost [Abstract]        
Service cost $ 1,027 $ 831 $ 3,079 $ 2,493
Interest cost 1,406 1,375 4,218 4,124
Expected return on plan assets (2,961) (3,042) (8,882) (9,127)
Amortization of unrecognized net loss/(gain) 377 366 1,131 1,099
Amortization of prior service cost/(credit) 11 2 33 6
Net periodic benefit cost (140) (468) (421) (1,405)
Post-retirement Benefits [Member]        
Net periodic benefit cost [Abstract]        
Service cost 0 0 0 0
Interest cost 20 22 61 65
Expected return on plan assets 0 0 0 0
Amortization of unrecognized net loss/(gain) (1) (3) (4) (10)
Amortization of prior service cost/(credit) (45) (45) (134) (134)
Net periodic benefit cost $ (26) $ (26) $ (77) $ (79)