Years after the initial intelligence revelations delivered by Edward Snowden, the hits keep on coming, this time, from AT&T.

In newly exposed NSA documents, the agency's relationship with AT&T in regards to surveillance is portrayed as "highly collaborative," and the telecom company is described as having an "extreme willingness to help."

See also: Where the 2016 presidential candidates stand on the NSA

Although AT&T had already been pegged as one of the companies working closely with the NSA on surveillance matters, the new documents, revealed in a report from ProPublica and The New York Times on Saturday, indicate that the telecom giant may have been a more willing surveillance partner than had generally been believed.

The Snowden-provided documents, which span from 2001 to 2013, also reveal that the budget for the NSA's surveillance relationship with AT&T was double that of the "next-largest such program," further indicating a particularly meaningful relationship between the two organizations. In one document, an NSA official, when detailing protocol for visiting AT&T facilities in regards to etiquette, is quoted as saying, "This is a partnership, not a contractual relationship."

According to the documents, AT&T gave the NSA access to "billions" of emails on its domestic network. But perhaps the most damning information relates to the telecom company's handling of one of the most vital international organizations on the planet: the United Nations.

The documents reportedly indicate that AT&T helped the NSA by providing "technical assistance in carrying out a secret court order permitting the wiretapping of all Internet communications at the United Nations headquarters, a customer of AT&T."

Reviewed by ProPublica and the Times, the new documents could further undermine AT&T's efforts to discount past accusations (see video below) that it has worked too closely with U.S. intelligence agencies.

The report says that despite the details contained in the documents, it remains unclear whether or not these AT&T programs are still in effect today.

Back in June, Congress passed a law (the USA Freedom Act) designed to end the bulk collection of domestic phone records by the NSA. Then, in July, the Obama administration announced that millions of American phone records collected by the NSA would be destroyed.

However, these newly publicized Snowden documents are likely to cast an even darker shadow of doubt on the telecom company just as some of the attention around the Snowden documents has begun to die down.