Pension and Other Postretirement Benefit Plans (Details) (USD $)	12 Months Ended
Dec. 31, 2014 Transaction	Dec. 31, 2013	Dec. 31, 2012
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%acw_PercentageOfFairValueHierarchy	100.00%acw_PercentageOfFairValueHierarchy
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	2acw_NumberOfStrategicAssetAllocations
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]

Years of service for eligibility to participate in defined benefit pension plans.

No definition available.

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- Details

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- Definition

Refers to lower limit of percentage of asset allocation for Retirement plan.

+ References

No definition available.

+ Details

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- Definition

Refers to strategic allocation percentage of asset allocation for retirement plan.

+ References

No definition available.

+ Details

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- Definition

Refers to upper limit of percentage of asset allocation for retirement plan.

+ References

No definition available.

+ Details

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- Definition

Refers to minimum long-term rate of return on assets as real rate of return.

+ References

No definition available.

+ Details

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Refers to moving period under defined benefit plan.

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Refers to percentage over inflation as return on assets.

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No definition available.

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Refers to years of service of vesting of hourly employees under defined benefit plan.

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Refers to unfunded status of defined benefit plan.

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Represents minimum period for investment horizon to view interim fluctuations with appropriate perspective.

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Represents number of strategic asset allocations derived for plans.

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Amount after tax of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) related to pension and other postretirement benefit plans.

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No definition available.

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Net of tax amount of the income statement impact of the reclassification adjustment for actuarial (gains) losses recognized as a component of net periodic benefit cost.

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No definition available.

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Refers to amount of pension and other postretirement benefit plans (gain) loss included in accumulated other comprehensive income (loss) and income statement.

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No definition available.

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Refers to percentage of fair value hierarchy It represents percentage of fir value of assets measurement at each hierarchy level in terms of percentage.

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The total aggregate amount in accumulated other comprehensive income related to benefit plans for the next fiscal year.

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No definition available.

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The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

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- Definition

The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

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The amount of gains or losses recognized in net periodic benefit cost.

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The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation.

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The aggregate net amount recognized in the balance sheet associated with the defined benefit plan(s). Will normally be the same as the Defined Benefit Plan, Funded Status of Plan, Total.

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The interest rate used to adjust for the time value of money for the plan.

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Expected rate of compensation increases (for pay-related plans).

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The interest rate used to adjust for the time value of money.

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An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-SubTopic 20

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-Paragraph 1

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Expected rate of compensation increases (for pay-related plans).

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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-Subparagraph (a)

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-Name Accounting Standards Codification

-Glossary Accumulated Postretirement Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6503904

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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-Name Accounting Standards Codification

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-Topic 715

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The increase in the fair value of plan assets from contributions made by the employer.

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The amount of contributions made by plan participants. This item represents a periodic increase to the plan obligation and an increase to plan assets.

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For a classified balance sheet, the amount recognized in balance sheet as a current asset associated with the plan.

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The amount of decrease that is related to an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.

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Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

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Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.

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The effect of a one-percentage-point increase in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

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The effect of a one-percentage-point increase in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.

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Amount of benefits from a defined benefit plan expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.

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Amount included in accumulated other comprehensive income (AOCI) related to prior service cost (credit) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

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Amount of the period's gross receipts received from the prescription drug subsidy, which is to be used in the roll forward of the accumulated postretirement benefit obligation of an applicable postretirement benefit plan.

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The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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Amount of other defined benefit plan costs.

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Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

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For a classified balance sheet, the amount recognized in balance sheet as a current liability associated with an underfunded defined benefit plan.

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