Employee Benefits (Details) (USD $) | 12 Months Ended | 1 Months Ended | |
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Sep. 28, 2013 | Jul. 27, 2013 |
Target allocation and pension plan asset allocation | | | | | |
Contributions made to defined benefit pension plans | $3,413,000 | $13,391,000 | | | |
Estimated fair value of plan assets | 122,104,000 | 119,555,000 | 97,586,000 | | |
Reconciliation of benefit obligation: | | | | | |
Benefit obligation at beginning of year | 203,263,000 | 226,725,000 | | | |
Service cost | 7,701,000 | 9,427,000 | 8,843,000 | | |
Interest cost | 9,627,000 | 8,199,000 | 8,918,000 | | |
Actuarial losses (gains) | 44,322,000 | -30,968,000 | | | |
Benefits paid | -6,699,000 | -6,916,000 | | | |
Plan settlement | -638,000 | | | | |
Agreement termination gain | | -3,204,000 | | | |
Benefit obligation at end of year | 257,576,000 | 203,263,000 | 226,725,000 | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at beginning of year | 119,555,000 | 97,586,000 | | | |
Actual return on plan assets | 6,473,000 | 15,494,000 | | | |
Employer contributions | 3,413,000 | 13,391,000 | | | |
Benefits paid | -6,699,000 | -6,916,000 | | | |
Plan settlement | -638,000 | | | | |
Fair value of plan assets at end of year | 122,104,000 | 119,555,000 | 97,586,000 | | |
Expected future net benefit payments | | | | | |
2015 | 8,723,000 | | | | |
2016 | 10,751,000 | | | | |
2017 | 12,026,000 | | | | |
2018 | 13,667,000 | | | | |
2019 | 12,921,000 | | | | |
2020 - 2024 | 85,984,000 | | | | |
Agreement termination gain, net of tax | | 1,954,000 | | | |
Agreement termination gain, before tax | | 3,204,000 | | | |
Agreement termination gain unrecognized in other comprehensive income, before tax | | 2,148,000 | | | |
Agreement termination gain unrecognized in other comprehensive income, net of tax | | 1,310,000 | | | |
Settlement | 156,000 | | 1,796,000 | | |
Funded status | -135,472,000 | -83,708,000 | | | |
Components of net periodic benefit cost: | | | | | |
Service cost | 7,701,000 | 9,427,000 | 8,843,000 | | |
Interest cost | 9,627,000 | 8,199,000 | 8,918,000 | | |
Expected return on plan assets | -8,695,000 | -6,458,000 | -6,431,000 | | |
Amortization and other | 2,075,000 | 6,303,000 | 6,748,000 | | |
Agreement termination gain | | -3,204,000 | | | |
Settlement | 156,000 | | 1,796,000 | | |
Curtailment | | | 1,134,000 | | |
Net periodic benefit cost | 10,864,000 | 14,267,000 | 21,008,000 | | |
Amounts not reflected in net periodic benefit cost and included in accumulated other comprehensive loss (AOCL) before taxes | | | | | |
Total accumulated other comprehensive loss | 85,604,000 | 38,571,000 | | | |
Amounts in AOCL expected to be recognized as components of net periodic benefit cost in 2014 | | | | | |
Amounts in AOCL expected to be recognized as components of net periodic benefit cost in 2014 | 5,494,000 | | | | |
Contribution expense for multi-employer pension fund, the United Food & Commercial Workers International Union-Industry Pension Fund, which covers certain union employees under a collective bargaining agreement | 593,000 | 594,000 | 584,000 | | |
Maximum percentage of total contributions to multi-employer pension fund | 5.00% | 5.00% | 5.00% | | |
Defined benefit pension plan | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Number of defined benefit plans | 2 | | | | |
Requisite service period upon attaining age of 21 to be eligible for participation | 1 year | | | | |
Requisite age of employees to be eligible for participation | 21 years | | | | |
Contributions made to defined benefit pension plans | | | | 10,000,000 | |
Estimated fair value of plan assets | 122,104,000 | 119,555,000 | | | |
Weighted-average assumptions | | | | | |
Long-term rate of increase in compensation levels (as a percent) | 4.00% | 4.00% | 4.00% | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at beginning of year | 119,555,000 | | | | |
Employer contributions | | | | 10,000,000 | |
Fair value of plan assets at end of year | 122,104,000 | 119,555,000 | | | |
Expected future net benefit payments | | | | | |
Funded status | -47,725,000 | -8,820,000 | | | |
Accumulated benefit obligation | 144,110,000 | 110,653,000 | | | |
Defined benefit pension plan | Level 1 | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 117,241,000 | 114,177,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 117,241,000 | 114,177,000 | | | |
Defined benefit pension plan | Level 2 | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 4,863,000 | 5,378,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 4,863,000 | 5,378,000 | | | |
Defined benefit pension plan | Foreign equity securities | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 27,945,000 | 30,348,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 27,945,000 | 30,348,000 | | | |
Defined benefit pension plan | Foreign equity securities | Level 1 | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 27,945,000 | 30,348,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 27,945,000 | 30,348,000 | | | |
Defined benefit pension plan | Domestic equity securities | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 66,618,000 | 65,998,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 66,618,000 | 65,998,000 | | | |
Defined benefit pension plan | Domestic equity securities | Level 1 | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 66,618,000 | 65,998,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 66,618,000 | 65,998,000 | | | |
Defined benefit pension plan | Real estate mutual fund | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 8,977,000 | 8,866,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 8,977,000 | 8,866,000 | | | |
Defined benefit pension plan | Real estate mutual fund | Level 1 | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 8,977,000 | 8,866,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 8,977,000 | 8,866,000 | | | |
Defined benefit pension plan | Fixed income mutual funds | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 4,683,000 | 1,786,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 4,683,000 | 1,786,000 | | | |
Defined benefit pension plan | Fixed income mutual funds | Level 1 | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 4,683,000 | 1,786,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 4,683,000 | 1,786,000 | | | |
Defined benefit pension plan | Commodity mutual funds | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 3,831,000 | 2,756,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 3,831,000 | 2,756,000 | | | |
Defined benefit pension plan | Commodity mutual funds | Level 1 | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 3,831,000 | 2,756,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 3,831,000 | 2,756,000 | | | |
Defined benefit pension plan | International fixed income mutual funds | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 2,808,000 | 2,485,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 2,808,000 | 2,485,000 | | | |
Defined benefit pension plan | International fixed income mutual funds | Level 1 | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 2,808,000 | 2,485,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 2,808,000 | 2,485,000 | | | |
Defined benefit pension plan | Money market funds | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 2,205,000 | 1,938,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 2,205,000 | 1,938,000 | | | |
Defined benefit pension plan | Money market funds | Level 1 | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 2,205,000 | 1,938,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 2,205,000 | 1,938,000 | | | |
Defined benefit pension plan | Corporate bonds | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | | 1,528,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | | 1,528,000 | | | |
Defined benefit pension plan | Corporate bonds | Level 2 | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | | 1,528,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | | 1,528,000 | | | |
Defined benefit pension plan | Other | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 5,037,000 | 3,850,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 5,037,000 | 3,850,000 | | | |
Defined benefit pension plan | Other | Level 1 | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 174,000 | | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 174,000 | | | | |
Defined benefit pension plan | Other | Level 2 | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Estimated fair value of plan assets | 4,863,000 | 3,850,000 | | | |
Reconciliation of fair value of plan assets: | | | | | |
Fair value of plan assets at end of year | 4,863,000 | 3,850,000 | | | |
Defined benefit pension plan | Minimum | | | | | |
Weighted-average assumptions | | | | | |
Discount rate used to determine obligations (as a percent) | 3.15% | 3.55% | 2.50% | | |
Discount rate used to determine net periodic benefit cost (as a percent) | 3.55% | 2.50% | 3.75% | | |
Expected return on plan assets (as a percent) | 7.00% | 6.50% | 6.50% | | |
Defined benefit pension plan | Minimum | Foreign equity securities | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Target Allocations (as a percent) | | | | | 20.00% |
Defined benefit pension plan | Minimum | Fixed income | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Target Allocations (as a percent) | | | | | 10.00% |
Defined benefit pension plan | Minimum | Alternative investments | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Target Allocations (as a percent) | | | | | 10.00% |
Defined benefit pension plan | Minimum | Domestic equity securities | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Target Allocations (as a percent) | | | | | 40.00% |
Defined benefit pension plan | Maximum | | | | | |
Weighted-average assumptions | | | | | |
Discount rate used to determine obligations (as a percent) | 4.40% | 5.20% | 4.15% | | |
Discount rate used to determine net periodic benefit cost (as a percent) | 5.20% | 4.15% | 4.70% | | |
Expected return on plan assets (as a percent) | 8.00% | 7.25% | 7.25% | | |
Defined benefit pension plan | Maximum | Foreign equity securities | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Target Allocations (as a percent) | | | | | 25.00% |
Defined benefit pension plan | Maximum | Fixed income | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Target Allocations (as a percent) | | | | | 25.00% |
Defined benefit pension plan | Maximum | Alternative investments | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Target Allocations (as a percent) | | | | | 15.00% |
Defined benefit pension plan | Maximum | Domestic equity securities | | | | | |
Target allocation and pension plan asset allocation | | | | | |
Target Allocations (as a percent) | | | | | 50.00% |
Supplemental executive plans and retirement agreements | | | | | |
Expected future net benefit payments | | | | | |
Accumulated benefit obligation | $72,816,000 | $61,462,000 | | | |