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Accumulated Other Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 2015
Equity [Abstract] |
Activity in Accumulated Other Comprehensive Income | Activity in accumulated other comprehensive income for the three months ended March 31, 2015 and 2014 was as follows:
|  | Unrealized Gains and Losses on Available-for-Sale |  |  | Unrealized Gains and Losses on Interest-Only |  |  |  |  |  |  |
|  |  |  | Tax Benefit |  |  |  |
|  | Securities |  |  | Strip |  |  | (Expense) |  |  | Total |
|  |  |  |  | (In thousands) |  |  |  |
For the three months ended March 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | (985 | ) |  | $ | 16 |  |  | $ | 1,432 |  |  | $ | 463 |
Other comprehensive income (loss) before reclassification |  |  | 12,043 |  |  |  | — |  |  |  | (4,123 | ) |  |  | 7,920 |
Reclassification from accumulated other comprehensive income |  |  | (2,184 | ) |  |  | — |  |  |  | — |  |  |  | (2,184 | )
Period change |  |  | 9,859 |  |  |  | — |  |  |  | (4,123 | ) |  |  | 5,736 |
Balance at end of period |  | $ | 8,874 |  |  | $ | 16 |  |  | $ | (2,691 | ) |  | $ | 6,199 |
For the three months ended March 31, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period |  | $ | (18,187 | ) |  | $ | 16 |  |  | $ | 8,791 |  |  | $ | (9,380 | )
Other comprehensive income (loss) before reclassification |  |  | 8,098 |  |  |  | 1 |  |  |  | (2,807 | ) |  |  | 5,292 |
Reclassification from accumulated other comprehensive income |  |  | (1,421 | ) |  |  | — |  |  |  | — |  |  |  | (1,421 | )
Period change |  |  | 6,677 |  |  |  | 1 |  |  |  | (2,807 | ) |  |  | 3,871 |
Balance at end of period |  | $ | (11,510 | ) |  | $ | 17 |  |  | $ | 5,984 |  |  | $ | (5,509 | )

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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=36458714&loc=SL7669686-108580 + Details
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