Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 36,324	$ 45,479
Accounts receivable, net of allowances of $1,950 and $2,893	219,578	230,613
Prepaid expenses and other current assets	8,302	8,033
Prepaid income taxes	753	2,378
Deferred income taxes	4,138	4,724
Total current assets	269,095	291,227
Property and equipment, net of accumulated depreciation of $86,813 and $82,512	20,350	20,528
Deferred income taxes	9,203	5,260
Goodwill	50,630	62,280
Other intangible assets, net	12,424	15,157
Other non-current assets	10,518	11,355
Total assets	372,220	405,807
Current liabilities:
Short-term borrowings	1,250	2,812
Accounts payable	30,071	38,019
Accrued compensation and related expenses	36,005	46,123
Other accrued expenses and other current liabilities	14,502	16,037
Income taxes payable	1,015	245
Total current liabilities	82,843	103,236
Deferred compensation	9,094	9,393
Deferred income taxes	1,034	2,994
Other non-current liabilities	4,896	5,010
Total liabilities	97,867	120,633
Commitments and contingencies
Equity:
Preferred stock, $0.10 par value - authorized 1,000 shares; none issued	0	0
Common stock	2,208	2,196
Additional paid-in-capital	72,023	70,104
Retained earnings	258,113	265,207
Accumulated other comprehensive (loss) income	(6,207)	(712)
Common stock in treasury, at cost - 2,463 shares	(52,487)	(52,487)
Total CDI shareholders' equity	273,650	284,308
Noncontrolling interest	703	866
Total equity	274,353	285,174
Total liabilities and equity	372,220	405,807
Common Class B
Equity:
Common stock	$ 0	$ 0