Significant Acquisition Costs Significant Acquisition Costs by Segment (Details) - Recall Transaction and IODC Transaction [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Business Combination, Separately Recognized Transactions [Line Items]
Total Significant Acquisition Costs	$ 9,286	$ 18,047	$ 38,715	$ 58,595
North American Records and Information Management business
Business Combination, Separately Recognized Transactions [Line Items]
Total Significant Acquisition Costs	950	2,540	4,551	16,165
North American Data Management Business
Business Combination, Separately Recognized Transactions [Line Items]
Total Significant Acquisition Costs	83	301	434	1,984
Western European Business
Business Combination, Separately Recognized Transactions [Line Items]
Total Significant Acquisition Costs	1,806	2,586	5,385	7,933
Other International Business
Business Combination, Separately Recognized Transactions [Line Items]
Total Significant Acquisition Costs	2,001	2,570	3,434	6,158
Global Data Center Business
Business Combination, Separately Recognized Transactions [Line Items]
Total Significant Acquisition Costs	232	0	11,572	0
Corporate and Other
Business Combination, Separately Recognized Transactions [Line Items]
Total Significant Acquisition Costs	$ 4,214	$ 10,050	$ 13,339	$ 26,355