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Investments (Tables) | 12 Months Ended
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Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract] |
Schedule of Amortized Cost and Fair Value of Securities Available-for-sale | The amortized cost and fair value of securities available for sale are as follows:
|  | As of December 31, 2015
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Available for sale: |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | 196,402 |  |  | $ | 1,370 |  |  | $ | (2,381 | ) |  | $ | 195,391 |
|  | As of December 31, 2014
|  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Available for sale: |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | 167,740 |  |  | $ | 2,686 |  |  | $ | (1,492 | ) |  | $ | 168,934 |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | The following table summarizes the amount of gross unrealized losses for our mortgage-backed securities and the estimated fair value by length of time the securities have been in an unrealized loss position:
|  | Less than 12 months |  | 12 months or more |  | Total
|  | Gross unrealized losses |  | Estimated fair value |  | Gross unrealized losses |  | Estimated fair value |  | Gross unrealized losses |  | Estimated fair value
As of December 31, 2015: |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | (827 | ) |  | $ | 73,802 |  |  | $ | (1,554 | ) |  | $ | 39,271 |  |  | $ | (2,381 | ) |  | $ | 113,073 |
As of December 31, 2014: |  |  |  |  |  |  |  |  |  |  |  |
Mortgage-backed securities |  | $ | (27 | ) |  | $ | 12,147 |  |  | $ | (1,465 | ) |  | $ | 41,462 |  |  | $ | (1,492 | ) |  | $ | 53,609 |
Amortized Cost and Fair Value of Securities by Contractual Maturities | As of December 31, 2015, the amortized cost and fair value of securities, by contractual maturities, are summarized below. Contractual maturities versus actual maturities may differ due to the effect of prepayments.
Year of Maturity |  | Amortized Cost |  | Estimated Fair Value
2038 |  | $ | 284 |  |  | $ | 307 |
2039 |  | 7,539 |  |  | 8,054 |
2042 |  | 22,336 |  |  | 21,282 |
2043 |  | 59,961 |  |  | 60,165 |
2044 |  | 47,833 |  |  | 47,815 |
2045 |  | 58,449 |  |  | 57,768 |
Total |  | $ | 196,402 |  |  | $ | 195,391 |

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- Definition Tabular disclosure of fair value of investments in debt and equity securities in an unrealized loss position categorized neither as held-to-maturity nor trading securities. + References No definition available. + Details
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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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