Supplemental balance sheet information (goodwill) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Goodwill [Roll Forward]
Goodwill, gross, beginning of year	$ 796,998
Accumulated impairment charges, beginning of year	(20,000)
Goodwill, net of accumulated impairment charges, beginning of year	776,998
Acqusition of OrangeSoda, Inc. (see Note 5)	12,735
Currency translation adjustment	9
Goodwill, gross, end of period	809,742
Accumulated impairment charges, end of period	(20,000)
Goodwill, net of accumulated impairment charges, end of period	789,742
Small Business Services [Member]
Goodwill [Roll Forward]
Goodwill, gross, beginning of year	621,314
Accumulated impairment charges, beginning of year	(20,000)
Goodwill, net of accumulated impairment charges, beginning of year	601,314
Acqusition of OrangeSoda, Inc. (see Note 5)	12,735
Currency translation adjustment	9
Goodwill, gross, end of period	634,058
Accumulated impairment charges, end of period	(20,000)
Goodwill, net of accumulated impairment charges, end of period	614,058
Financial Services [Member]
Goodwill [Roll Forward]
Goodwill, gross, beginning of year	27,178
Accumulated impairment charges, beginning of year	0
Goodwill, net of accumulated impairment charges, beginning of year	27,178
Acqusition of OrangeSoda, Inc. (see Note 5)	0
Currency translation adjustment	0
Goodwill, gross, end of period	27,178
Accumulated impairment charges, end of period	0
Goodwill, net of accumulated impairment charges, end of period	27,178
Direct Checks [Member]
Goodwill [Roll Forward]
Goodwill, gross, beginning of year	148,506
Accumulated impairment charges, beginning of year	0
Goodwill, net of accumulated impairment charges, beginning of year	148,506
Acqusition of OrangeSoda, Inc. (see Note 5)	0
Currency translation adjustment	0
Goodwill, gross, end of period	148,506
Accumulated impairment charges, end of period	0
Goodwill, net of accumulated impairment charges, end of period	$ 148,506