Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 17,074	$ 26,644
Accounts receivable, net of allowances of $2,152 and $3,698	248,822	222,889
Prepaid expenses and other current assets	9,472	10,322
Prepaid income taxes	1,675	2,182
Deferred income taxes	9,175	9,693
Total current assets	286,218	271,730
Property and equipment, net of depreciation of $73,625 and $75,914	22,963	25,295
Deferred income taxes	1,156	5,522
Goodwill	62,068	61,527
Other intangible assets, net	17,108	18,023
Other non-current assets	8,818	8,599
Total assets	398,331	390,696
Liabilities and Equity
Cash overdraft	2,279	3,363
Accounts payable	34,493	36,170
Accrued compensation and related expenses	47,087	41,943
Other accrued expenses and other current liabilities	17,686	25,278
Income taxes payable	1,802	3,207
Short-term Debt	2,800	0
Total current liabilities	106,147	109,961
Deferred compensation	8,754	9,324
Other non-current liabilities	3,607	4,380
Total liabilities	118,508	123,665
Commitments and Contingencies
Equity:
Preferred stock, $.10 par value - authorized 1,000 shares; none issued	0	0
Common stock	2,180	2,164
Additional paid-in-capital	66,865	63,860
Retained earnings	259,951	253,344
Accumulated other comprehensive income (loss)	2,546	(306)
Less common stock in treasury, at cost - 2,463 shares	(52,487)	(52,487)
Total CDI shareholders' equity	279,055	266,575
Noncontrolling interest	768	456
Total equity	279,823	267,031
Total liabilities and equity	398,331	390,696
Common Class B [Member]
Equity:
Common stock	$ 0	$ 0