XML 57 R100.htm IDEA: XBRL DOCUMENT v2.4.0.8
Employee benefit plans - Components of Net Periodic Pension Cost and Other Amounts Recognized in Other Comprehensive Income (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Components of net periodic pension cost:      
Net loss (gain) $ (3,883) $ (7,525)  
Pension Benefits [Member]
      
Components of net periodic pension cost:      
Service cost         
Interest cost 646 673 700
Expected return on plan assets (825) (809) (903)
Amortization of prior service cost         
Amortization of unrecognized net gain loss 180 136 82
Curtailment loss         
Net periodic benefit cost 1   (121)
Net loss (gain) (3,883) (6,252) 1,351
Prior service cost         
Amortization of prior service cost         
Deferred tax 1,359 2,091 (459)
Total recognized in other comprehensive income (1,564) 488 892
Total recognized in net period pension cost and other comprehensive income (1,563) 488 771
Postretirement Life Insurance Benefits [Member]
      
Components of net periodic pension cost:      
Service cost 35 48 43
Interest cost 111 139 147
Amortization of prior service cost       7
Amortization of unrecognized net gain loss 96 111 105
Net periodic benefit cost 242 298 302
Net loss (gain) (1,273) (1,273) 148
Prior service cost       8
Amortization of prior service cost       (7)
Deferred tax 620 620 (53)
Total recognized in other comprehensive income (653) 122 96
Total recognized in net period pension cost and other comprehensive income $ (411) $ 420 $ 398