Note 14 - Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Guarantor Subsidiaries [Member]
Net cash provided by operating activities	$ 13,500	$ 2,226
Cash paid for acquisitions, net	(92,348)	(2,299)
Purchases of building, equipment and leasehold improvements, net	(1,179)	(1,670)
Working capital and other settlements for acquisitions	(271)	(91)
Proceeds from foreign currency net investment hedges	1,649	4,812
Other	(150)	(1,250)
Net cash used in investing activities	$ (92,299)	$ (498)
Borrowings under senior secured revolving credit facility
Proceeds from the exercise of options and warrants
Excess tax benefit related to share-based compensation
Net repayments under working capital facilities
Repayment of contingent earnout obligation
Repayment under senior secured revolving credit facility
Intercompany notes and investments and other	$ 47,342	$ 7,088
Net cash provided by (used in) financing activities	$ 47,342	$ 7,088
Exchange rate impact on cash and cash equivalents
Net increase in cash and cash equivalents	$ (31,457)	$ 8,816
Cash and cash equivalents, beginning of period	33,011	388
Cash and cash equivalents, end of period	$ 1,554	9,204
Purchases of stock for treasury
Non-Guarantor Subsidiaries [Member]
Net cash provided by operating activities	$ 2,266	$ 3,938
Cash paid for acquisitions, net
Purchases of building, equipment and leasehold improvements, net	$ (1,558)	$ (559)
Working capital and other settlements for acquisitions
Proceeds from foreign currency net investment hedges
Other
Net cash used in investing activities	$ (1,558)	$ (559)
Borrowings under senior secured revolving credit facility
Proceeds from the exercise of options and warrants
Excess tax benefit related to share-based compensation
Net repayments under working capital facilities	$ (1,623)	$ (132)
Repayment of contingent earnout obligation		$ (1,023)
Repayment under senior secured revolving credit facility
Intercompany notes and investments and other
Net cash provided by (used in) financing activities	$ (1,623)	$ (1,155)
Exchange rate impact on cash and cash equivalents	506	(509)
Net increase in cash and cash equivalents	(409)	1,715
Cash and cash equivalents, beginning of period	14,854	9,363
Cash and cash equivalents, end of period	$ 14,445	$ 11,078
Purchases of stock for treasury
Parent Company [Member]
Net cash provided by operating activities
Cash paid for acquisitions, net
Purchases of building, equipment and leasehold improvements, net
Working capital and other settlements for acquisitions
Proceeds from foreign currency net investment hedges
Other
Net cash used in investing activities
Borrowings under senior secured revolving credit facility	$ 75,000	$ 25,478
Proceeds from the exercise of options and warrants	582	8,855
Excess tax benefit related to share-based compensation	$ 4,766	$ 2,086
Net repayments under working capital facilities
Repayment of contingent earnout obligation
Repayment under senior secured revolving credit facility	$ (25,000)	$ (29,331)
Intercompany notes and investments and other	$ (47,342)	$ (7,088)
Net cash provided by (used in) financing activities
Exchange rate impact on cash and cash equivalents
Net increase in cash and cash equivalents
Cash and cash equivalents, beginning of period
Cash and cash equivalents, end of period
Purchases of stock for treasury	$ (8,006)
Consolidation, Eliminations [Member]
Net cash provided by operating activities
Cash paid for acquisitions, net
Purchases of building, equipment and leasehold improvements, net
Working capital and other settlements for acquisitions
Proceeds from foreign currency net investment hedges
Other
Net cash used in investing activities
Borrowings under senior secured revolving credit facility
Proceeds from the exercise of options and warrants
Excess tax benefit related to share-based compensation
Net repayments under working capital facilities
Repayment of contingent earnout obligation
Repayment under senior secured revolving credit facility
Intercompany notes and investments and other
Net cash provided by (used in) financing activities
Exchange rate impact on cash and cash equivalents
Net increase in cash and cash equivalents
Cash and cash equivalents, beginning of period
Cash and cash equivalents, end of period
Purchases of stock for treasury
Net cash provided by operating activities	$ 15,766	$ 6,164
Cash paid for acquisitions, net	(92,348)	(2,299)
Purchases of building, equipment and leasehold improvements, net	(2,737)	(2,229)
Working capital and other settlements for acquisitions	(271)	(91)
Proceeds from foreign currency net investment hedges	1,649	4,812
Other	(150)	(1,250)
Net cash used in investing activities	(93,857)	(1,057)
Borrowings under senior secured revolving credit facility	75,000	25,478
Proceeds from the exercise of options and warrants	582	8,855
Excess tax benefit related to share-based compensation	4,766	2,086
Net repayments under working capital facilities	$ (1,623)	(132)
Repayment of contingent earnout obligation		(1,023)
Repayment under senior secured revolving credit facility	$ (25,000)	$ (29,331)
Intercompany notes and investments and other
Net cash provided by (used in) financing activities	$ 45,719	$ 5,933
Exchange rate impact on cash and cash equivalents	506	(509)
Net increase in cash and cash equivalents	(31,866)	10,531
Cash and cash equivalents, beginning of period	47,865	9,751
Cash and cash equivalents, end of period	15,999	$ 20,282
Purchases of stock for treasury	$ (8,006)