Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 6,325	$ 26,644
Accounts receivable, net of allowances of $2,502 and $3,698	244,652	222,889
Prepaid expenses and other current assets	8,318	10,322
Prepaid income taxes	1,960	2,182
Deferred income taxes	6,883	9,693
Total current assets	268,138	271,730
Property and equipment, net of depreciation of $71,076 and $75,914	23,602	25,295
Deferred income taxes	4,980	5,522
Goodwill	61,524	61,527
Other intangible assets, net	17,436	18,023
Other non-current assets	8,299	8,599
Total assets	383,979	390,696
Liabilities and Equity
Cash overdraft	0	3,363
Accounts payable	32,847	36,170
Accrued compensation and related expenses	45,430	41,943
Other accrued expenses and other current liabilities	19,946	25,278
Income taxes payable	627	3,207
Total current liabilities	98,850	109,961
Deferred compensation	8,174	9,324
Other non-current liabilities	3,822	4,380
Total liabilities	110,846	123,665
Commitments and Contingencies
Equity:
Preferred stock, $.10 par value - authorized 1,000 shares; none issued	0	0
Common stock	2,179	2,164
Additional paid-in-capital	66,212	63,860
Retained earnings	257,115	253,344
Accumulated other comprehensive income (loss)	(542)	(306)
Less common stock in treasury, at cost - 2,463 shares	(52,487)	(52,487)
Total CDI shareholders' equity	272,477	266,575
Noncontrolling interest	656	456
Total equity	273,133	267,031
Total liabilities and equity	383,979	390,696
Common Class B [Member]
Equity:
Common stock	$ 0	$ 0