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Ad revenue and circulation continued to slide at the Washington Post in the first three months of the year, according to a new Securities and Exchange Commission filing from the Washington Post Company.

The paper’s Sunday and daily print circulation fell by 7.7 percent and 7.2 percent respectively, when compared to the first quarter of 2012.

Print advertising revenue dropped 8 percent to $48.6 million, but online ad revenue increased for the Post‘s websites by 8 percent. Also up, although less happily for the Post: operating losses. The Post Co.’s newspaper division had $34.5 million in losses, up nearly $14 million from its $20.6 million in operating losses in the first three months of 2012.