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Other Comprehensive Income (Tables) | 6 Months Ended
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Jun. 30, 2013
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | The following table summarizes activity in the unrealized gain or loss on available for sale securities included in other comprehensive income for the six-months and quarters ended June 30, 2013 and 2012.
| For the six months ended June 30, |  | For the quarters ended June 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
Balance at beginning of period | $ | 7,940,000 |  |  | $ | 7,401,000 |  |  | $ | 5,474,000 |  |  | $ | 7,088,000 |
Unrealized gains (losses) arising during the period | (16,410,000 | ) |  | 2,159,000 |  |  | (12,915,000 | ) |  | 2,118,000 |
Reclassification of realized gains during the period | (1,087,000 | ) |  | (1,967,000 | ) |  | (788,000 | ) |  | (1,444,000 | )
Related deferred taxes | 6,124,000 |  |  | (67,000 | ) |  | 4,796,000 |  |  | (236,000 | )
Net change | (11,373,000 | ) |  | 125,000 |  |  | (8,907,000 | ) |  | 438,000 |
Balance at end of period | $ | (3,433,000 | ) |  | $ | 7,526,000 |  |  | $ | (3,433,000 | ) |  | $ | 7,526,000 |
The following table summarizes activity in the unrealized gain or loss on postretirement benefits included in other comprehensive income for the six-months and quarters ended June 30, 2013 and 2012.
| For the six months ended June 30, |  | For the quarters ended June 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
Unrecognized postretirement benefits at beginning of period | $ | (123,000 | ) |  | $ | (87,000 | ) |  | $ | (119,000 | ) |  | $ | (82,000 | )
Amortization of unrecognized transition obligation | 5,000 |  |  | 14,000 |  |  | — |  |  | 7,000 |
Change in accumulated losses | 4,000 |  |  | — |  |  | 6,000 |  |  | — |
Related deferred taxes | (1,000 | ) |  | (4,000 | ) |  | (2,000 | ) |  | (2,000 | )
Unrecognized postretirement benefits at end of period | $ | (115,000 | ) |  | $ | (77,000 | ) |  | $ | (115,000 | ) |  | $ | (77,000 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669686-108580 + Details
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