Tablet shipments are still on the decline, but there's one bright spot in the market: detachable devices, according to new data from IDC.

Not even the holiday season could stop the market from declining in the fourth quarter of 2015: Tablet shipments dropped 13.7 percent year year to 65.9 million units during the period, the research firm said. For the year overall, shipments totaled 206.8 million, down 10.1 percent from 230.1 million in 2014.

If you consider 2-in-1s as part of the tablet market, however, the devices "reached an all-time high" of 8.1 million units.

"One of the biggest reasons why detachables are growing so fast is because end users are seeing those devices as PC replacements," IDC's Tablet Research Director, Jean Philippe Bouchard, said in a statement.

IDC estimated that Apple sold more than 2 million iPad Pros during the period, making it the top-selling detachable. Microsoft peddled around 1.6 million Surface devices, the majority of which were the Surface Pro, not the cheaper Surface 3

"With these results, it's clear that price is not the most important feature considered when acquiring a detachable — performance is," Bouchard said.

Meanwhile, pure slate tablets "experienced their greatest annual decline," dropping 21.1 percent in 2015, IDC said. Another interesting tidbit to note: prices on slate tablets "have not yet hit rock bottom," which should be welcome news for budget-conscious consumers.

Breaking it down by vendor, Apple is still the world's top tablet maker, despite a 24.8 percent year-over-year decline in the fourth quarter. Samsung came in second for the quarter, but saw tablet shipments decline 18.1 percent compared to last year. No. 3 Amazon had a huge quarter, growing its tablet shipments 175.7 percent year over year, primarily thanks to its super-cheap Fire, which was deemed the "holiday season's surprise hit." Lenovo and Huawei rounded out the top 5.

This article originally appeared on PCMag.com.