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Other Comprehensive Income (Loss) Other Comprehensive Income (Loss) (Notes) | 6 Months Ended
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Jun. 30, 2015
Statement of Comprehensive Income [Abstract] |
Comprehensive Income (Loss) Note [Text Block] | Other Comprehensive Income Other comprehensive income components, net of tax, are shown in the following table for the three-month and six-month periods ended June 30, 2015 and 2014:
Three months ended June 30, (in thousands) |  | Changes in pension plan assets and benefit obligations |  | Unrealized gains and losses on available for sale securities |  | Total
Beginning balance at March 31, 2015 |  | $ | (14,865 | ) |  | $ | 9,116 |  |  | $ | (5,749 | )
| Other comprehensive loss before reclassifications |  | — |  |  | (8,231 | ) |  | (8,231 | )
| Amounts reclassified from accumulated other comprehensive loss |  | — |  |  | — |  |  | — |
Net current period other comprehensive loss |  | — |  |  | (8,231 | ) |  | (8,231 | )
Ending balance at June 30, 2015 |  | $ | (14,865 | ) |  | $ | 885 |  |  | $ | (13,980 | )
Beginning balance at March 31, 2014 |  | $ | (5,598 | ) |  | $ | (18,880 | ) |  | $ | (24,478 | )
| Other comprehensive income before reclassifications |  | — |  |  | 13,092 |  |  | 13,092 |
| Amounts reclassified from accumulated other comprehensive income |  | — |  |  | (13 | ) |  | (13 | )
Net current period other comprehensive income |  | — |  |  | 13,079 |  |  | 13,079 |
Ending balance at June 30, 2014 |  | $ | (5,598 | ) |  | $ | (5,801 | ) |  | $ | (11,399 | )
Six months ended June 30, (in thousands) |  | Changes in pension plan assets and benefit obligations |  | Unrealized gains and losses on available for sale securities |  | Total
Beginning balance at December 31, 2014 |  | $ | (14,865 | ) |  | $ | 1,257 |  |  | $ | (13,608 | )
| Other comprehensive loss before reclassifications |  | — |  |  | (372 | ) |  | (372 | )
| Amounts reclassified from accumulated other comprehensive loss |  | — |  |  | — |  |  | — |
Net current period other comprehensive loss |  | — |  |  | (372 | ) |  | (372 | )
Ending balance at June 30, 2015 |  | $ | (14,865 | ) |  | $ | 885 |  |  | $ | (13,980 | )
Beginning balance at December 31, 2013 |  | $ | (5,598 | ) |  | $ | (29,821 | ) |  | $ | (35,419 | )
| Other comprehensive income before reclassifications |  | — |  |  | 24,033 |  |  | 24,033 |
| Amounts reclassified from accumulated other comprehensive income |  | — |  |  | (13 | ) |  | (13 | )
Net current period other comprehensive income |  | — |  |  | 24,020 |  |  | 24,020 |
Ending balance at June 30, 2014 |  | $ | (5,598 | ) |  | $ | (5,801 | ) |  | $ | (11,399 | )
During the three-month and six-month periods ended June 30, 2015, there were no reclassifications out of accumulated other comprehensive income. During the three-month and six-month periods ended June 30, 2014, there was $20,000 ($13,000 net of tax) reclassified out of accumulated other comprehensive income due to gains on the sale of available-for-sale securities. These gains were recorded within miscellaneous income on the consolidated condensed statements of income.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e689-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669619-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e640-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e716-108580 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e709-108580 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e637-108580 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e681-108580 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Reclassification Adjustments -URI http://asc.fasb.org/extlink&oid=6522872 + Details
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