Note 12 - Segment and Related Information (Detail) - Financial Information by Geographic Location (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenue by geographic area	$ 1,038,019	$ 958,180	$ 715,954
Long-Lived Assets by geographic area	390,210	332,678	296,812
United States [Member]
Revenue by geographic area	738,150	690,205	516,786
Long-Lived Assets by geographic area	304,954	252,751	243,194
Canada [Member]
Revenue by geographic area	48,643	51,713	23,846
Long-Lived Assets by geographic area	11,830	11,730	12,334
EMEA [Member]
Revenue by geographic area	121,175	115,319	113,295
Long-Lived Assets by geographic area	30,729	25,814	26,380
Latin America and Mexico [Member]
Revenue by geographic area	88,157	76,355	62,027
Long-Lived Assets by geographic area	11,158	12,920	14,904
Asia Pacific [Member]
Revenue by geographic area	41,894	24,588
Long-Lived Assets by geographic area	$ 31,539	$ 29,463