Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 43,652	$ 26,644
Accounts receivable, net of allowances of $2,563 and $3,698	223,630	222,889
Prepaid expenses and other current assets	10,515	10,322
Prepaid income taxes	698	2,182
Deferred income taxes	3,850	9,693
Total current assets	282,345	271,730
Property and equipment, net of accumulated depreciation of $75,159 and $75,914	22,090	25,295
Deferred income taxes	7,061	7,342
Goodwill	62,009	61,527
Other intangible assets, net	16,782	18,023
Other non-current assets	10,418	8,599
Total assets	400,705	392,516
Current liabilities:
Short-term borrowings	2,751	0
Cash overdraft	0	3,363
Accounts payable	41,157	36,170
Accrued compensation and related expenses	43,571	41,943
Other accrued expenses and other current liabilities	12,825	19,236
Accrued customer rebates	2,145	6,042
Income taxes payable	1,759	3,207
Total current liabilities	104,208	109,961
Deferred compensation	8,398	9,324
Deferred income tax	1,875	1,820
Other non-current liabilities	6,444	4,380
Total liabilities	120,925	125,485
Equity:
Preferred stock, $0.10 par value - authorized 1,000 shares; none issued	0	0
Common stock	2,182	2,164
Additional paid-in-capital	67,863	63,860
Retained earnings	259,912	253,344
Accumulated other comprehensive income (loss)	1,501	(306)
Common stock in treasury, at cost - 2,463 shares	(52,487)	(52,487)
Total CDI shareholders' equity	278,971	266,575
Noncontrolling interest	809	456
Total equity	279,780	267,031
Total liabilities and equity	400,705	392,516
Common Class B
Equity:
Common stock	$ 0	$ 0