Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 45,479	$ 43,652
Accounts receivable, net of allowances of $2,893 and $2,563	230,613	223,630
Prepaid expenses and other current assets	8,033	10,515
Prepaid income taxes	2,378	698
Deferred income taxes	4,724	3,850
Total current assets	291,227	282,345
Property and equipment, net of accumulated depreciation of $82,512 and $75,159	20,528	22,090
Deferred income taxes	5,260	7,061
Goodwill	62,280	62,009
Other intangible assets, net	15,157	16,782
Other non-current assets	11,355	10,418
Total assets	405,807	400,705
Current liabilities:
Short-term borrowings	2,812	2,751
Accounts payable	38,019	41,157
Accrued compensation and related expenses	46,123	43,571
Other accrued expenses and other current liabilities	16,037	14,970
Income taxes payable	245	1,759
Total current liabilities	103,236	104,208
Deferred compensation	9,393	8,398
Deferred income tax	2,994	1,875
Other non-current liabilities	5,010	6,444
Total liabilities	120,633	120,925
Commitments and contingencies
Equity:
Preferred stock, $0.10 par value - authorized 1,000 shares; none issued	0	0
Common stock	2,196	2,182
Additional paid-in-capital	70,104	67,863
Retained earnings	265,207	259,912
Accumulated other comprehensive (loss) income	(712)	1,501
Common stock in treasury, at cost - 2,463 shares	(52,487)	(52,487)
Total CDI shareholders' equity	284,308	278,971
Noncontrolling interest	866	809
Total equity	285,174	279,780
Total liabilities and equity	405,807	400,705
Common Class B
Equity:
Common stock	$ 0	$ 0