Restatement - Narrative (Details) (USD $)
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3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | |||||||||||||||||||||||||||||||||||
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2011
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Sep. 30, 2011
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Dec. 31, 2012
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Dec. 31, 2011
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Mar. 31, 2013
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Mar. 31, 2012
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Jun. 30, 2013
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Jun. 30, 2012
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Jun. 30, 2011
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Jun. 30, 2010
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(Overstatement) understatement of accrued postretirement benefits | $ 22,989,000 | $ 22,878,000 | $ 22,815,000 | $ 22,526,000 | $ 19,239,000 | $ 19,172,000 | $ 19,027,000 | $ 22,878,000 | $ 19,172,000 | $ 22,989,000 | $ 19,239,000 | $ 16,076,000 | $ 22,526,000 | $ 18,996,000 | |||||||||||||||||||||||||
(Overstatement) understatement of other comprehensive income | (1,306,000) | (7,157,000) | 2,979,000 | (36,972,000) | (5,211,000) | (3,813,000) | (7,280,000) | (4,178,000) | (11,093,000) | (5,484,000) | (16,304,000) | (6,480,000) | (53,150,000) | (29,355,000) | (31,297,000) | ||||||||||||||||||||||||
Adjustments
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(Overstatement) understatement of accrued postretirement benefits | (12,404,000) | [1] | (12,280,000) | [1] | (12,155,000) | [1] | (12,031,000) | [2] | (5,476,000) | [1] | (5,180,000) | [1] | (4,884,000) | [1] | (12,280,000) | [1] | (5,180,000) | [1] | (12,404,000) | [1] | (5,476,000) | [1] | (12,031,000) | [2] | (4,589,000) | [2] | |||||||||||||
(Overstatement) understatement of other comprehensive income | 109,000 | [3] | 137,000 | [3] | 105,000 | [3] | 8,503,000 | [3] | 290,000 | [3] | 297,000 | [3] | 304,000 | [3] | 242,000 | [3] | 601,000 | [3] | 351,000 | [3] | 891,000 | [3] | 9,520,000 | [4] | 9,151,000 | [4],[5] | (2,557,000) | [4],[5] | |||||||||||
Retiree Medical Plan | Adjustments
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(Overstatement) understatement of accrued postretirement benefits | (20,700,000) | (20,700,000) | (11,200,000) | ||||||||||||||||||||||||||||||||||||
(Overstatement) understatement of other comprehensive income | 19,200,000 | [4] | 11,100,000 | [4] | |||||||||||||||||||||||||||||||||||
Death Benefit Plan | Adjustments
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(Overstatement) understatement of accrued postretirement benefits | 8,100,000 | 8,100,000 | 6,400,000 | ||||||||||||||||||||||||||||||||||||
(Overstatement) understatement of other comprehensive income | (2,200,000) | [4] | (800,000) | [4] | |||||||||||||||||||||||||||||||||||
Understatement of the Cash Surrender Value of life insurance | $ 2,200,000 | $ 2,200,000 | $ 2,100,000 | ||||||||||||||||||||||||||||||||||||
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