Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010
Cash Flows from Operating Activities
Net income before noncontrolling interests	$ 13,732	$ 14,219
Adjustments to reconcile net income to net cash provided by operating activities:
Net (income)/loss from discontinued operations	(101)	1,478
Depreciation and amortization	9,401	6,577
Stock-based compensation	1,894	959
Changes in assets and liabilities:
(Increase)/decrease in receivables	(6,796)	3,649
Decrease/(increase) in unbilled revenues	561	(1,230)
Decrease/(increase) in other net assets	1,612	(2,702)
(Decrease)/increase in accounts payable	(6,499)	2,585
Decrease in billings in excess of revenues	(2,210)	(3,250)
Increase in accrued expenses	4,590	1,111
Net cash provided by continuing operations	16,184	23,396
Net cash (used in)/provided by discontinued operations	(704)	177
Net cash provided by operating activities	15,480	23,573
Cash Flows from Investing Activities
Additions to property, plant and equipment	(2,851)	(4,360)
Cash portion of acquisitions, net of cash acquired	(3,134)	(52,381)
Purchase of short-term investments		(250)
Maturity of short-term investments		1,500
Purchase of available-for-sale securities	(9,046)	(16,438)
Sale of available-for-sale securities	4,308	9,119
Net cash used in continuing operations	(10,723)	(62,810)
Net cash provided by discontinued operations		9,965
Net cash used in investing activities	(10,723)	(52,845)
Cash Flows from Financing Activities
Proceeds from employee stock purchases and exercise of stock options	839	50
Payments on capital lease obligations	(143)	(206)
Treasury stock purchases	(86)
Noncontrolling interest distributions	(865)	(212)
Net cash used in financing activities	(255)	(368)
Net increase/(decrease) in cash and cash equivalents	4,502	(29,640)
Cash and cash equivalents, beginning of period	77,443	105,259
Cash and cash equivalents, end of period	$ 81,945	$ 75,619

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).