Deferred revenue and advance payments (in thousands) from customers consisted of the following, as of:


	December 31,
	2014			2013
Current:
Deferred product licenses revenue	$	10,927		$	14,538
Deferred subscription services revenue		16,018			10,923
Deferred product support revenue		168,833			167,771
Deferred other services revenue		10,564			17,056

Gross current deferred revenue and advance payments		206,342			210,288
Less: unpaid deferred revenue		(97,929	)		(96,632	)

Net current deferred revenue and advance payments	$	108,413		$	113,656


Non-current:
Deferred product licenses revenue	$	8,012		$	4,401
Deferred subscription services revenue		750			1,161
Deferred product support revenue		7,505			5,877
Deferred other services revenue		1,047			1,175

Gross non-current deferred revenue and advance payments		17,314			12,614
Less: unpaid deferred revenue		(6,496	)		(3,644	)

Net non-current deferred revenue and advance payments	$	10,818		$	8,970