Summary of Significant Accounting Policies - Long Lived Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment information
Gain (Loss) on sale of real estate	$ 2,310	$ 1,059	$ 10,512
Gain (loss) on disposal/write-down of property, plant and equipment (excluding real estate)	(1,412)	(3,000)	(1,065)
Tax effect on gain on sale of real estate	(130)	(209)	(2,205)
Gain on Sale of Real Estate, Net of Tax	$ 2,180	850	$ 8,307
North American Records and Information Management Business
Segment information
Gain (loss) on disposal/write-down of property, plant and equipment (excluding real estate)		1,500
Western European Business
Segment information
Gain (loss) on disposal/write-down of property, plant and equipment (excluding real estate)		$ 1,800