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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Activity in Accumulated Other Comprehensive Income | Activity in accumulated other comprehensive income for the year ended December 31, 2017, 2016 and 2015 was as follows:
| Unrealized Gains and Losses on Available-for-Sale Securities |  | Unrealized Gains and Losses on Interest-Only Strip |  | Tax Benefit (Expense) |  | Total
|  |  | (In thousands) |  |
For the year ended December 31, 2017 |  |  |  |  |  |  |
Balance at beginning of period | $ | (4,089 | ) |  | $ | — |  |  | $ | 1,695 |  |  | $ | (2,394 | )
Other comprehensive loss before reclassification | 2,649 |  |  | — |  |  | (376 | ) |  | $ | 2,273 |
Reclassification from accumulated other comprehensive loss | (1,748 | ) |  | — |  |  | — |  |  | $ | (1,748 | )
Period change | 901 |  |  | — |  |  | (376 | ) |  | $ | 525 |
Balance at end of period | $ | (3,188 | ) |  | $ | — |  |  | $ | 1,319 |  |  | $ | (1,869 | )
For the year ended December 31, 2016 |  |  |  |  |  |  |
Balance at beginning of period | $ | (2,331 | ) |  | $ | 9 |  |  | $ | 2,007 |  |  | $ | (315 | )
Other comprehensive loss before reclassification | (1,712 | ) |  | (9 | ) |  | (312 | ) |  | $ | (2,033 | )
Reclassification from accumulated other comprehensive income | (46 | ) |  | — |  |  | — |  |  | $ | (46 | )
Period change | (1,758 | ) |  | (9 | ) |  | (312 | ) |  | (2,079 | )
Balance at end of period | $ | (4,089 | ) |  | $ | — |  |  | $ | 1,695 |  |  | $ | (2,394 | )
For the year ended December 31, 2015 |  |  |  |  |  |  |
Balance at beginning of period | $ | (985 | ) |  | $ | 16 |  |  | $ | 1,432 |  |  | $ | 463 |
Other comprehensive (loss) income before reclassification | 5,265 |  |  | (7 | ) |  | 575 |  |  | $ | 5,833 |
Reclassification from accumulated other comprehensive loss | (6,611 | ) |  |  |  |  | — |  |  | $ | (6,611 | )
Period change | (1,346 | ) |  | (7 | ) |  | 575 |  |  | (778 | )
Balance at end of period | $ | (2,331 | ) |  | $ | 9 |  |  | $ | 2,007 |  |  | $ | (315 | )

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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=84228862&loc=SL7669686-108580 + Details
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