Pension and Other Postretirement Benefit Plans (Details) (USD $) | 12 Months Ended |
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 |
Transaction |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-beginning of period | $220,707,000 | | |
Fair value of assets-end of period | 228,132,000 | 220,707,000 | |
Assumed health care cost trend rates [Abstract] | | | |
Health care cost trend rate assumed for next year (in hundredths) | 7.17% | 7.63% | |
Rate to which the cost trend rate is assumed to decline (in hundredths) | 4.81% | 4.82% | |
Year that the rate reaches the ultimate trend rate | 2024 | 2022 | |
Effect of one-percentage point change in assumed health care cost trend rates [Abstract] | | | |
1- Percentage Point Increase, Effect on total of service and interest cost | 1,034,000 | | |
1- Percentage Point Decrease, Effect on total of service and interest cost | -556,000 | | |
1- Percentage Point Increase, Effect on postretirement benefit obligation | 11,763,000 | | |
1- Percentage Point Decrease, Effect on postretirement benefit obligation | -9,498,000 | | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 228,132,000 | 220,707,000 | |
% of Total (in hundredths) | 100.00% | 100.00% | |
% of fair value hierarchy (in hundredths) | 100.00% | 100.00% | |
Real rate of return (in hundredths) | 5.00% | | |
Percentage over inflation (in hundredths) | 5.00% | | |
Minimum period for investment horizon | 5 years | | |
Number of strategic asset allocations | 2 | | |
Asset allocation [Abstract] | | | |
Primary objective | the primary objective is to achieve a minimum rate of return of Consumer Price Index plus 3 | | |
Moving period | 4 years | | |
Other Plans [Abstract] | | | |
Defined contribution plan, expenses recognized | 1,100,000 | 1,300,000 | 1,400,000 |
Cash and cash equivalents [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 6,756,000 | 8,314,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 6,756,000 | 8,314,000 | |
% of Total (in hundredths) | 3.00% | 4.00% | |
U.S. large-cap [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 23,845,000 | 21,639,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 23,845,000 | 21,639,000 | |
% of Total (in hundredths) | 10.00% | 10.00% | |
U.S. mid-cap [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 13,255,000 | 6,840,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 13,255,000 | 6,840,000 | |
% of Total (in hundredths) | 6.00% | 3.00% | |
U.S. small-cap [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 4,426,000 | 3,399,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 4,426,000 | 3,399,000 | |
% of Total (in hundredths) | 2.00% | 2.00% | |
US indexed [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 12,018,000 | 18,954,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 12,018,000 | 18,954,000 | |
% of Total (in hundredths) | 5.00% | 9.00% | |
Canadian large cap equity securities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 5,503,000 | 27,574,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 5,503,000 | 27,574,000 | |
% of Total (in hundredths) | 2.00% | 12.00% | |
Canadian mid cap equity securities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 2,002,000 | 11,263,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 2,002,000 | 11,263,000 | |
% of Total (in hundredths) | 1.00% | 5.00% | |
Canadian small cap equity securities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 167,000 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 167,000 | 0 | |
% of Total (in hundredths) | 0.00% | 0.00% | |
Large growth [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 6,381,000 | 11,659,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 6,381,000 | 11,659,000 | |
% of Total (in hundredths) | 3.00% | 5.00% | |
Pooled equities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 9,516,000 | 14,046,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 9,516,000 | 14,046,000 | |
% of Total (in hundredths) | 4.00% | 6.00% | |
International markets [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 14,588,000 | 26,545,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 14,588,000 | 26,545,000 | |
% of Total (in hundredths) | 6.00% | 12.00% | |
Government bonds [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 34,978,000 | 21,939,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 34,978,000 | 21,939,000 | |
% of Total (in hundredths) | 15.00% | 10.00% | |
Corporate bonds [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 94,697,000 | 48,535,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 94,697,000 | 48,535,000 | |
% of Total (in hundredths) | 42.00% | 22.00% | |
Equity Securities [Member] | | | |
Targeted assets mix [Abstract] | | | |
Minimum (in hundredths) | 14.00% | | |
Maximum (in hundredths) | 20.00% | | |
Foreign Equities [Member] | | | |
Asset allocation [Abstract] | | | |
Lower Limit (in hundredths) | 5.00% | | |
Strategic Allocation (in hundredths) | 11.00% | | |
Upper Limit (in hundredths) | 15.00% | | |
Targeted assets mix [Abstract] | | | |
Minimum (in hundredths) | 7.00% | | |
Maximum (in hundredths) | 10.00% | | |
Bonds and Mortgages [Member] | | | |
Targeted assets mix [Abstract] | | | |
Minimum (in hundredths) | 70.00% | | |
Maximum (in hundredths) | 80.00% | | |
Short-Term [Member] | | | |
Targeted assets mix [Abstract] | | | |
Minimum (in hundredths) | 0.00% | | |
Maximum (in hundredths) | 0.00% | | |
Domestic large capitalization growth equities [Member] | | | |
Asset allocation [Abstract] | | | |
Lower Limit (in hundredths) | 10.00% | | |
Strategic Allocation (in hundredths) | 13.00% | | |
Upper Limit (in hundredths) | 20.00% | | |
Domestic large capitalization index passive equities. [Member] | | | |
Asset allocation [Abstract] | | | |
Lower Limit (in hundredths) | 15.00% | | |
Strategic Allocation (in hundredths) | 20.00% | | |
Upper Limit (in hundredths) | 25.00% | | |
Domestic Large Capitalization Value Equities [Member] | | | |
Asset allocation [Abstract] | | | |
Lower Limit (in hundredths) | 10.00% | | |
Strategic Allocation (in hundredths) | 10.00% | | |
Upper Limit (in hundredths) | 20.00% | | |
Domestic Small Cap Equities [Member] | | | |
Asset allocation [Abstract] | | | |
Lower Limit (in hundredths) | 2.00% | | |
Strategic Allocation (in hundredths) | 10.00% | | |
Upper Limit (in hundredths) | 10.00% | | |
Fixed income intermediate [Member] | | | |
Asset allocation [Abstract] | | | |
Lower Limit (in hundredths) | 15.00% | | |
Strategic Allocation (in hundredths) | 35.00% | | |
Upper Limit (in hundredths) | 35.00% | | |
Level 1 [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 117,391,000 | 116,434,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 117,391,000 | 116,434,000 | |
% of fair value hierarchy (in hundredths) | 51.00% | 53.00% | |
Level 1 [Member] | Cash and cash equivalents [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 6,756,000 | 8,314,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 6,756,000 | 8,314,000 | |
Level 1 [Member] | U.S. large-cap [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 12,030,000 | 21,639,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 12,030,000 | 21,639,000 | |
Level 1 [Member] | U.S. mid-cap [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 1 [Member] | U.S. small-cap [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 1 [Member] | US indexed [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 1 [Member] | Canadian large cap equity securities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 5,503,000 | 27,574,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 5,503,000 | 27,574,000 | |
Level 1 [Member] | Canadian mid cap equity securities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 2,002,000 | 11,263,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 2,002,000 | 11,263,000 | |
Level 1 [Member] | Canadian small cap equity securities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 167,000 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 167,000 | 0 | |
Level 1 [Member] | Large growth [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 1 [Member] | Pooled equities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 10,775,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 10,775,000 | |
Level 1 [Member] | International markets [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 1 [Member] | Government bonds [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 30,812,000 | 11,185,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 30,812,000 | 11,185,000 | |
Level 1 [Member] | Corporate bonds [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 60,121,000 | 25,684,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 60,121,000 | 25,684,000 | |
Level 2 [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 110,741,000 | 104,273,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 110,741,000 | 104,273,000 | |
% of fair value hierarchy (in hundredths) | 49.00% | 47.00% | |
Level 2 [Member] | Cash and cash equivalents [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 2 [Member] | U.S. large-cap [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 11,815,000 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 11,815,000 | 0 | |
Level 2 [Member] | U.S. mid-cap [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 13,255,000 | 6,840,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 13,255,000 | 6,840,000 | |
Level 2 [Member] | U.S. small-cap [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 4,426,000 | 3,399,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 4,426,000 | 3,399,000 | |
Level 2 [Member] | US indexed [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 12,018,000 | 18,954,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 12,018,000 | 18,954,000 | |
Level 2 [Member] | Canadian large cap equity securities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 2 [Member] | Canadian mid cap equity securities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 2 [Member] | Canadian small cap equity securities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 2 [Member] | Large growth [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 6,381,000 | 11,659,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 6,381,000 | 11,659,000 | |
Level 2 [Member] | Pooled equities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 9,516,000 | 3,271,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 9,516,000 | 3,271,000 | |
Level 2 [Member] | International markets [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 14,588,000 | 26,545,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 14,588,000 | 26,545,000 | |
Level 2 [Member] | Government bonds [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 4,166,000 | 10,754,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 4,166,000 | 10,754,000 | |
Level 2 [Member] | Corporate bonds [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 34,576,000 | 22,851,000 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 34,576,000 | 22,851,000 | |
Level 3 [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
% of fair value hierarchy (in hundredths) | 0.00% | 0.00% | |
Level 3 [Member] | Cash and cash equivalents [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 3 [Member] | U.S. large-cap [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 3 [Member] | U.S. mid-cap [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 3 [Member] | U.S. small-cap [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 3 [Member] | US indexed [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 3 [Member] | Canadian large cap equity securities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 3 [Member] | Canadian mid cap equity securities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 3 [Member] | Canadian small cap equity securities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 3 [Member] | Large growth [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 3 [Member] | Pooled equities [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 3 [Member] | International markets [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 3 [Member] | Government bonds [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Level 3 [Member] | Corporate bonds [Member] | | | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-end of period | 0 | 0 | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | |
Pension Benefits [Member] | | | |
Change in benefit obligation [Roll Forward] | | | |
Benefit obligation-beginning of period | 232,901,000 | 259,706,000 | |
Service cost | 1,088,000 | 1,156,000 | 1,785,000 |
Interest cost | 10,764,000 | 10,320,000 | 11,198,000 |
Actuarial losses (gains) | 31,205,000 | -12,102,000 | |
Benefits paid | -14,421,000 | -18,260,000 | |
Foreign currency exchange rate changes | -10,679,000 | -8,074,000 | |
Curtailment | 0 | 0 | |
Plan Amendment | 0 | 0 | |
Incurred retiree drug subsidy reimbursements | 0 | 0 | |
Plan participant's contribution | 103,000 | 155,000 | |
Benefit obligation-end of period | 250,961,000 | 232,901,000 | 259,706,000 |
Accumulated benefit obligation | 250,745,000 | 232,208,000 | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-beginning of period | 220,707,000 | 203,268,000 | |
Actual return on plan assets | 21,939,000 | 33,625,000 | |
Employer contributions | 11,376,000 | 9,539,000 | |
Plan participant's contribution | 103,000 | 155,000 | |
Benefits paid | -14,421,000 | -18,260,000 | |
Foreign currency exchange rate changes | -11,572,000 | -7,620,000 | |
Fair value of assets-end of period | 228,132,000 | 220,707,000 | 203,268,000 |
Reconciliation of funded status [Abstract] | | | |
Unfunded status | -22,829,000 | -12,194,000 | |
Amounts recorded in the consolidated balance sheets [Abstract] | | | |
Prepaid benefit cost | 9,518,000 | 8,493,000 | |
Accrued benefit liability | -32,348,000 | -20,687,000 | |
Accumulated other comprehensive loss (income) | 35,621,000 | 15,201,000 | |
Net amount recognized | 12,791,000 | 3,007,000 | |
Amounts recorded in AOCI in the following fiscal year [Abstract] | | | |
Amortization of prior service (credit) cost | 44,000 | 44,000 | |
Amortization of net (gain)/loss | 1,304,000 | 201,000 | |
Total amortization | 1,348,000 | 245,000 | |
Components of net periodic benefit cost [Abstract] | | | |
Service cost-benefits earned during the period | 1,088,000 | 1,156,000 | 1,785,000 |
Interest cost on projected benefit obligation | 10,764,000 | 10,320,000 | 11,198,000 |
Expected return on plan assets | -12,812,000 | -11,726,000 | -11,800,000 |
Prior service cost (net) | 44,000 | 44,000 | 44,000 |
Other amortization (net) | 211,000 | 2,607,000 | 1,035,000 |
Total benefits cost charged to income | -705,000 | 2,401,000 | 2,262,000 |
Recognized in other comprehensive income (loss) [Abstract] | | | |
Amortization of net transition (asset) obligation | 0 | 0 | -1,035,000 |
Prior service (credit) cost | 0 | 0 | 0 |
Amortization of prior service (credit) cost | -44,000 | -44,000 | -44,000 |
Change in net actuarial (gain) loss | 20,674,000 | -35,568,000 | 16,052,000 |
Amount of net actuarial valuation (gain) loss | -211,000 | -2,607,000 | 0 |
Amounts recognized in other comprehensive income | 20,419,000 | -38,219,000 | 14,973,000 |
Amounts recognized in total benefits charged to income and other comprehensive income | 19,714,000 | -35,818,000 | 17,235,000 |
Assumptions used to determine benefit obligations [Abstract] | | | |
Average discount rate (in hundredths) | 3.99% | 4.77% | |
Rate of increase in future compensation levels (in hundredths) | 3.00% | 3.00% | |
Assumptions used to determine net periodic benefit cost [Abstract] | | | |
Average discount rate (in hundredths) | 4.77% | 4.19% | |
Rate of increase in future compensation levels (in hundredths) | 3.00% | 3.00% | |
Expected long-term rate of return on assets (in hundredths) | 6.12% | 6.08% | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 228,132,000 | 220,707,000 | 203,268,000 |
Pension and postretirement benefits, Expected payments [Abstract] | | | |
2014 | 14,029,000 | | |
2015 | 14,067,000 | | |
2016 | 13,890,000 | | |
2017 | 14,037,000 | | |
2018 | 14,099,000 | | |
2019 - 2023 (in total) | 72,275,000 | | |
Anticipated contribution during next year | 8,300,000 | | |
U.S plan [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit pension plan period of service for eligibility (in years) | 1 year | | |
Defined benefit plans period of service of vesting of hourly employees (in years) | 5 years | | |
U.S plan [Member] | Foreign Equities [Member] | | | |
Asset allocation [Abstract] | | | |
Lower Limit (in hundredths) | 5.00% | | |
Strategic Allocation (in hundredths) | 13.00% | | |
Upper Limit (in hundredths) | 15.00% | | |
U.S plan [Member] | Domestic large capitalization growth equities [Member] | | | |
Asset allocation [Abstract] | | | |
Lower Limit (in hundredths) | 10.00% | | |
Strategic Allocation (in hundredths) | 10.00% | | |
Upper Limit (in hundredths) | 20.00% | | |
U.S plan [Member] | Domestic large capitalization index passive equities. [Member] | | | |
Asset allocation [Abstract] | | | |
Lower Limit (in hundredths) | 15.00% | | |
Strategic Allocation (in hundredths) | 17.00% | | |
Upper Limit (in hundredths) | 25.00% | | |
U.S plan [Member] | Domestic Large Capitalization Value Equities [Member] | | | |
Asset allocation [Abstract] | | | |
Lower Limit (in hundredths) | 10.00% | | |
Strategic Allocation (in hundredths) | 10.00% | | |
Upper Limit (in hundredths) | 20.00% | | |
U.S plan [Member] | Domestic Small Cap Equities [Member] | | | |
Asset allocation [Abstract] | | | |
Lower Limit (in hundredths) | 5.00% | | |
Strategic Allocation (in hundredths) | 10.00% | | |
Upper Limit (in hundredths) | 15.00% | | |
U.S plan [Member] | Fixed income intermediate [Member] | | | |
Asset allocation [Abstract] | | | |
Lower Limit (in hundredths) | 15.00% | | |
Strategic Allocation (in hundredths) | 35.00% | | |
Upper Limit (in hundredths) | 35.00% | | |
U.S plan [Member] | Money Market Funds [Member] | | | |
Asset allocation [Abstract] | | | |
Lower Limit (in hundredths) | 1.00% | | |
Strategic Allocation (in hundredths) | 5.00% | | |
Upper Limit (in hundredths) | 10.00% | | |
Canadian plan [Member] | | | |
Defined Benefit Plan Disclosure [Line Items] | | | |
Defined benefit pension plan period of service for eligibility (in years) | 2 years | | |
Defined benefit plans period of service of vesting of hourly employees (in years) | 2 years | | |
Other Benefits [Member] | | | |
Change in benefit obligation [Roll Forward] | | | |
Benefit obligation-beginning of period | 74,933,000 | 87,125,000 | |
Service cost | 340,000 | 528,000 | 478,000 |
Interest cost | 3,670,000 | 3,467,000 | 3,999,000 |
Actuarial losses (gains) | 12,469,000 | -10,801,000 | |
Benefits paid | -4,295,000 | -4,078,000 | |
Foreign currency exchange rate changes | -1,780,000 | -1,325,000 | |
Curtailment | 0 | 0 | |
Plan Amendment | 435,000 | -539,000 | |
Incurred retiree drug subsidy reimbursements | 180,000 | 172,000 | |
Plan participant's contribution | 422,000 | 384,000 | |
Benefit obligation-end of period | 86,374,000 | 74,933,000 | 87,125,000 |
Accumulated benefit obligation | 86,374,000 | 74,933,000 | |
Change in plan assets [Roll Forward] | | | |
Fair value of assets-beginning of period | 0 | 0 | |
Actual return on plan assets | 0 | 0 | |
Employer contributions | 3,873,000 | 3,694,000 | |
Plan participant's contribution | 422,000 | 384,000 | |
Benefits paid | -4,295,000 | -4,078,000 | |
Foreign currency exchange rate changes | 0 | 0 | |
Fair value of assets-end of period | 0 | 0 | 0 |
Reconciliation of funded status [Abstract] | | | |
Unfunded status | -86,374,000 | -74,933,000 | |
Amounts recorded in the consolidated balance sheets [Abstract] | | | |
Prepaid benefit cost | 0 | 0 | |
Accrued benefit liability | -86,374,000 | -74,933,000 | |
Accumulated other comprehensive loss (income) | 6,507,000 | -5,292,000 | |
Net amount recognized | -79,867,000 | -80,225,000 | |
Amounts recorded in AOCI in the following fiscal year [Abstract] | | | |
Amortization of prior service (credit) cost | -35,000 | -35,000 | |
Amortization of net (gain)/loss | 443,000 | 322,000 | |
Total amortization | 408,000 | 287,000 | |
Components of net periodic benefit cost [Abstract] | | | |
Service cost-benefits earned during the period | 340,000 | 528,000 | 478,000 |
Interest cost on projected benefit obligation | 3,670,000 | 3,467,000 | 3,999,000 |
Prior service cost (net) | -35,000 | 0 | 0 |
Other one-time charges | 435,000 | 0 | 0 |
Other amortization (net) | 299,000 | 114,000 | -34,000 |
Total benefits cost charged to income | 4,709,000 | 4,109,000 | 4,443,000 |
Recognized in other comprehensive income (loss) [Abstract] | | | |
Amortization of net transition (asset) obligation | 35,000 | 0 | 35,000 |
Change in net actuarial (gain) loss | 11,764,000 | -11,660,000 | 4,764,000 |
Amounts recognized in other comprehensive income | 11,799,000 | -11,660,000 | 4,799,000 |
Amounts recognized in total benefits charged to income and other comprehensive income | 16,508,000 | -7,551,000 | 9,242,000 |
Assumptions used to determine benefit obligations [Abstract] | | | |
Average discount rate (in hundredths) | 4.14% | 4.85% | |
Assumptions used to determine net periodic benefit cost [Abstract] | | | |
Average discount rate (in hundredths) | 4.85% | 4.20% | |
Defined benefit plan assets at value by hierarchy [Abstract] | | | |
Fair value of plan assets | 0 | 0 | 0 |
Pension and postretirement benefits, Expected payments [Abstract] | | | |
2014 | 4,406,000 | | |
2015 | 4,554,000 | | |
2016 | 4,742,000 | | |
2017 | 4,820,000 | | |
2018 | 4,937,000 | | |
2019 - 2023 (in total) | 25,766,000 | | |
Anticipated contribution during next year | $4,200,000 | | |