Pension Plan and Postretirement Benefits Other Than Pension (Details 3) - USD ($) $ in Thousands | 12 Months Ended | |
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2012 |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Amount of transfer between levels | $ 0 | $ 0 | |
Level 3 | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 3,402 | 4,019 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 3,402 | 4,019 | |
Sales | (3,432) | | |
Valuation change | 30 | (617) | |
Fair value of plan assets at end of year | | 3,402 | |
Pension Benefits | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Amount of transfer between levels | 0 | 0 | |
Total fair value | 175,548 | 170,430 | $ 133,911 |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 175,548 | 170,430 | |
Fair value of plan assets at end of year | 173,885 | 175,548 | |
Pension Benefits | Equity securities: Domestic | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 90,061 | 90,061 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 90,061 | | |
Fair value of plan assets at end of year | 92,037 | 90,061 | |
Pension Benefits | Equity securities: Foreign | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 29,351 | 29,351 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 29,351 | | |
Fair value of plan assets at end of year | 25,822 | 29,351 | |
Pension Benefits | Equity derivatives | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 116 | 116 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 116 | | |
Fair value of plan assets at end of year | 280 | 116 | |
Pension Benefits | Mortgage-backed securities | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 14 | 14 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 14 | | |
Fair value of plan assets at end of year | 11 | 14 | |
Pension Benefits | U.S. treasuries | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 8,113 | | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at end of year | 8,113 | | |
Pension Benefits | Corporate bonds | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 1,884 | 1,884 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 1,884 | | |
Fair value of plan assets at end of year | | 1,884 | |
Pension Benefits | Private equity | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 1,518 | 1,518 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 1,518 | | |
Fair value of plan assets at end of year | | 1,518 | |
Pension Benefits | Gold bullion | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 12,209 | 12,209 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 12,209 | | |
Fair value of plan assets at end of year | 5,226 | 12,209 | |
Pension Benefits | Total investment securities | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 135,153 | 135,153 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 135,153 | | |
Fair value of plan assets at end of year | 131,489 | 135,153 | |
Pension Benefits | Cash and other | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 40,395 | 40,395 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 40,395 | | |
Fair value of plan assets at end of year | 42,396 | 40,395 | |
Pension Benefits | Level 1 | Equity securities: Domestic | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 90,061 | 90,061 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 90,061 | | |
Fair value of plan assets at end of year | 92,037 | 90,061 | |
Pension Benefits | Level 1 | Equity securities: Foreign | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 29,351 | 29,351 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 29,351 | | |
Fair value of plan assets at end of year | 25,822 | 29,351 | |
Pension Benefits | Level 1 | Gold bullion | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 12,209 | 12,209 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 12,209 | | |
Fair value of plan assets at end of year | 5,226 | 12,209 | |
Pension Benefits | Level 1 | Total investment securities | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 131,621 | 131,621 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 131,621 | | |
Fair value of plan assets at end of year | 123,085 | 131,621 | |
Pension Benefits | Level 2 | Equity derivatives | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 116 | 116 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 116 | | |
Fair value of plan assets at end of year | 280 | 116 | |
Pension Benefits | Level 2 | Mortgage-backed securities | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 14 | 14 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 14 | | |
Fair value of plan assets at end of year | 11 | 14 | |
Pension Benefits | Level 2 | U.S. treasuries | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 8,113 | | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at end of year | 8,113 | | |
Pension Benefits | Level 2 | Total investment securities | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 130 | 130 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 130 | | |
Fair value of plan assets at end of year | 8,404 | 130 | |
Pension Benefits | Level 3 | Corporate bonds | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 1,884 | 1,884 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 1,884 | | |
Fair value of plan assets at end of year | | 1,884 | |
Pension Benefits | Level 3 | Private equity | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 1,518 | 1,518 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | 1,518 | | |
Fair value of plan assets at end of year | | 1,518 | |
Pension Benefits | Level 3 | Total investment securities | | | |
Pension Plan and Postretirement Benefits Other than Pension | | | |
Total fair value | 3,402 | 3,402 | |
Summary of the activity of plan assets categorized as Level 3 during the period | | | |
Fair value of plan assets at beginning of year | $ 3,402 | | |
Fair value of plan assets at end of year | | $ 3,402 | |