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Other Comprehensive Income Other Comprehensive Income | 6 Months Ended
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Jun. 30, 2013
Equity [Abstract] |
Other Comprehensive Income | 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 reclassification of realized gains is included in the net securities gain line of the consolidated statements of income and comprehensive income and the tax effect is included in the income tax expense line of the same statement. 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 | )
The reclassification of unrecognized transition obligation is a component of net periodic benefit cost (see Note 8) and the income tax effect is included in the income tax expense line of the consolidated statements of income and comprehensive income.

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