CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Operating Activities:
Net income	$ 16,120	$ 29,702	$ 24,549	$ 44,016
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	7,852	6,879	15,229	11,597
Share-based compensation expense	1,725	59	2,585	59
Changes in operating assets and liabilities	(15,201)	(66,495)	(71,662)	(111,643)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	10,496	(29,855)	(29,299)	(55,971)
Investing Activities:
Acquisition of businesses, net of cash acquired	(10,708)	(20,177)	(79,683)	(53,272)
Purchases of property, plant and equipment	(6,025)	(2,438)	(10,947)	(3,861)
Proceeds from sales or maturities of marketable securities	4,055		4,055
NET CASH USED IN INVESTING ACTIVITIES	(12,678)	(22,615)	(86,575)	(57,133)
Financing Activities:
Proceeds from short-term borrowings	10,000	45,000	30,000	70,000
Principal payments on short-term borrowings		(45,000)		(45,000)
Proceeds from long-term borrowings		50,000		50,000
Principal payments on long-term debt	(144)	(4,133)	(284)	(8,273)
Proceeds from issuance of common stock	113		113
Dividends paid	(3,215)	(3,208)	(3,215)	(3,208)
Net change in restricted cash	457	(313)	397	(84)
Contingent consideration payments related to acquisitions of businesses	(447)		(1,117)
NET CASH PROVIDED BY FINANCING ACTIVITIES	6,764	42,346	25,894	63,435
Effect of exchange rates on cash	(615)	(15,387)	11,431	(13,993)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	3,967	(25,511)	(78,549)	(63,662)
Cash and cash equivalents at the beginning of the period	121,376	174,116	203,892	212,267
CASH AND CASH EQUIVALENTS AT THE END OF THE PERIOD	125,343	148,605	125,343	148,605
Supplemental disclosure of non-cash investing and financing activities:
Receivable from the seller of NextBus		682		682
NEK
Operating Activities:
Net income	(300)	(300)	(400)	(300)
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred to acquire, net				19,552
ITMS
Operating Activities:
Net income	(200)		(700)
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred to acquire, net			3,301
Intific Inc.
Operating Activities:
Net income	(2,100)
Supplemental disclosure of non-cash investing and financing activities:
Liability incurred to acquire, net	$ 2,233		$ 2,233