Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current Assets
Cash and cash equivalents	$ 74,947	$ 77,443
Available-for-sale securities	13,997	9,795
Receivables, net of allowances of $761 and $601, respectively	77,957	73,681
Unbilled revenues on contracts in progress	60,319	58,884
Prepaid expenses and other	14,944	10,400
Total current assets	242,164	230,203
Property, Plant and Equipment, net	16,890	16,847
Goodwill	54,787	53,441
Other intangible assets, net	11,999	14,569
Deferred tax asset	1,074	878
Other long-term assets	5,416	5,127
Total assets	332,330	321,065
Current Liabilities
Accounts payable	36,157	38,918
Accrued employee compensation	28,895	20,638
Accrued insurance	11,424	11,992
Billings in excess of revenues on contracts in progress	17,888	18,816
Deferred income tax liability	6,450	6,405
Income taxes payable	418	545
Other accrued expenses	8,576	8,915
Total current liabilities	109,808	106,229
Long-term Liabilities
Deferred income tax liability	9,184	9,894
Other long-term liabilities	8,915	8,405
Total liabilities	127,907	124,528
Shareholders' Investment
Common Stock, par value $1, authorized 44,000,000 shares, issued 9,822,940 and 9,718,351, respectively	9,823	9,718
Additional paid-in capital	61,553	59,637
Retained earnings	136,987	131,301
Accumulated other comprehensive loss	(63)	(80)
Less - 499,185 and 495,537 shares of Common Stock in treasury, at cost, respectively	(4,847)	(4,761)
Total Michael Baker Corporation shareholders' investment	203,453	195,815
Noncontrolling interests	970	722
Total shareholders' investment	204,423	196,537
Total liabilities and shareholders' investment	$ 332,330	$ 321,065