CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net cash provided by operating activities	$ 46,796	$ 37,364
Cash flows from investing activities:
Cash paid for business acquisitions, net of cash acquired	(124,550)	(302)
Purchase of property and equipment	(15,159)	(23,436)
Internally developed software costs	(7,290)	(5,379)
Cash proceeds from sale of assets	110	597
Net cash used in investing activities	(146,889)	(28,520)
Cash flows from financing activities:
Debt issuance costs	(1,681)	(837)
Proceeds from borrowings of long-term debt	75,000
Repayment of long-term debt and other long-term obligations	(10,958)	(8,942)
Proceeds from revolver borrowings	23,000
Repayment of revolver borrowings	(16,000)
Payment of acquisition-related liabilities	(92)	(4,963)
Excess tax benefit related to share-based compensation	439	953
Common stock repurchases	(4,151)	(3,982)
Cash dividends paid	(9,929)	(9,544)
Proceeds from exercise of stock options	3,321	10,403
Net cash provided by (used in) financing activities	58,949	(16,912)
Effect of exchange rate changes on cash	(466)	(137)
Net decrease in cash and cash equivalents	(41,610)	(8,205)
Cash and cash equivalents at beginning of period	54,226	40,336
Cash and cash equivalents at end of period	12,616	32,131
Supplemental disclosure of cash flow information:
Cash paid for interest	12,624	10,606
Cash (recovered) paid for income taxes, net	(7,047)	6,625
Non-cash investing and financing transactions:
Property, equipment, and leasehold improvements accrued in accounts payable	2,893	2,047
Capital expenditures funded by capital lease borrowings	6,503	446
Capital leases assumed in business acquisition	9,061
Dividends declared	$ 3,500	3,289
Acquisition-related liabilities		$ 976