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Other Investment Securities | 6 Months Ended
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Jun. 30, 2019
Other Investment Securities [Abstract] |
Other Investment Securities | Other Investment Securities Other investment securities consist of stock investments in the FHLB, the FRB, and equity securities. The FHLB and FRB restricted stock investments are carried at their redemption value. Equity securities with a readily determinable fair value are carried at fair value. Equity securities without a readily determinable fair value are recorded at cost, minus impairment, if any, plus or minus changes resulting from observable price changes in orderly transactions ("modified cost"). Park's portfolio of equity investments in limited partnerships which provide mezzanine funding ("Partnership Investments") are valued using the net asset value practical expedient in accordance with ASC 820. The carrying amount of other investment securities at June 30, 2019 and December 31, 2018 was as follows:
(In thousands) |  | June 30, 2019 |  | December 31, 2018
FHLB stock |  | $ | 35,280 |  |  | $ | 43,388 |
FRB stock |  | 10,811 |  |  | 8,225 |
Equity investments carried at fair value |  | 1,832 |  |  | 1,649 |
Equity investments carried at cost/modified cost (1) |  | 2,689 |  |  | 2,589 |
Equity investments carried at net asset value |  | 16,718 |  |  | 17,065 |
Total other investment securities |  | $ | 67,330 |  |  | $ | 72,916 |
(1) There have been no impairments, downward adjustments, or upward adjustments made to equity investments carried at modified cost. During the three months ended June 30, 2019 and 2018, $62,000 and $304,000, respectively, of unrealized gains on equity investments carried at fair value were recorded within "Gain on equity securities, net" on the consolidated condensed statements of income. During the six months ended June 30, 2019 and 2018, $183,000 and $293,000, respectively, of unrealized gains on equity investments carried at fair value were recorded within "Gain on equity securities, net" on the consolidated condensed statements of income. During the three months ended June 30, 2019 and 2018, $170,000 and $1.0 million, respectively, of gains on equity investments carried at NAV were recorded within “Gain on equity securities, net” on the consolidated condensed statements of income. During the six months ended June 30, 2019 and 2018, $1.8 million and $752,000, respectively, of gains on equity investment carried at NAV were recorded within “Gain on equity securities, net” on the consolidated condensed statements of income. An additional $3.5 million gain recorded within “Gain on equity securities, net” on the consolidated condensed statement of income for the six months ended June 30, 2018 relates to Park's 8.55% investment in NewDominion which was held at June 30, 2018. See Note 3 - Business Combinations.

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