8. Foreign currency exchange contracts and hedging

As of December 31, 2018 and December 31, 2017, the Company’s total non-designated and designated derivative contracts had notional amounts totaling approximately $2,336 and $21,374, respectively, and $2,350 and $13,818, respectively. These contracts were comprised of offsetting contracts with the same counterparty, each expires within one to twelve months. During the years ended December 31, 2018, 2017, and 2016, these contracts had, net of tax, an unrealized gain of $404, an unrealized loss of $121, and an unrealized gain of $47, respectively.

The nonperformance risk of the Company and the counterparty did not have a material impact on the fair value of the derivatives. During the years ended December 31, 2018, 2017 and 2016, there were no ineffective portions relating to these hedges and the hedges remained effective through their respective settlement dates. As of December 31, 2018, the Company had twenty-nine designated hedges and four non-designated hedges. As of December 31, 2017, the Company had eighteen designated hedges and three non-designated hedges.