Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jul. 01, 2012
Cash Flows from Operating Activities
Net income before noncontrolling interests	$ 10,824	$ 4,550
Adjustments to reconcile net income before noncontrolling interests to net cash provided by operating activities:
Net income from discontinued operations		(501)
Depreciation and amortization	6,321	8,934
Stock-based compensation	717	1,175
Changes in assets and liabilities:
(Increase)/decrease in receivables	(11,136)	878
Decrease in unbilled revenues	5,336	5,166
Decrease in other net assets	1,364	710
(Decrease)/increase in accounts payable	(407)	399
Decrease in billings in excess of revenues	(4,241)	(2,562)
Decrease in accrued expenses and other	(481)	(1,571)
Net cash provided by continuing operations	8,297	17,178
Net cash used in discontinued operations		(25)
Net cash provided by operating activities	8,297	17,153
Cash Flows from Investing Activities
Additions to property, plant and equipment	(1,783)	(1,427)
Cash portion of acquisitions		(1,000)
Purchase of certificates of deposit	(2,000)
Purchase of available-for-sale securities	(13,380)	(801)
Sale of available-for-sale securities	2,845	13,130
Proceeds from sale of fixed assets	147	19
Net cash (used in)/provided by investing activities	(14,171)	9,921
Cash Flows from Financing Activities
Dividends paid	(1,545)
Proceeds from employee stock purchases and exercise of stock options	555	576
Treasury stock purchases	(281)	(272)
Noncontrolling interest distributions	(176)	(375)
Net cash used in financing activities	(1,447)	(71)
Net (decrease)/increase in cash and cash equivalents	(7,321)	27,003
Cash and cash equivalents, beginning of period	77,367	36,050
Cash and cash equivalents, end of period	$ 70,046	$ 63,053