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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events $20 Million Share Repurchase Program and Elimination of Cash Dividend On January 25, 2016, the Company announced that its Board of Directors approved a stock repurchase program (the "Stock Repurchase Program"). Under the Stock Repurchase Program, CDI is authorized to repurchase up to $20 million of its common stock from time to time and at prices considered appropriate by the Company. The stock repurchases may be made via privately negotiated transactions, open market purchases, block trades or by other means at management's discretion in compliance with applicable securities laws. The timing of repurchases and number of shares of common stock to be purchased will depend upon market conditions and other factors. The Company is not required to repurchase any specific number of shares and the Stock Repurchase Program may be modified, suspended or discontinued at any time without prior notice. The Stock Repurchase Program will remain in effect until fully utilized or until modified, suspended or discontinued. In connection with the new repurchase program, the Board also approved the elimination of the Company's dividend.