Segment Information Total Assets (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Assets, Continuing Operations		$ 1,428,096	$ 1,761,377
North America [Member]
Segment Reporting Information [Line Items]
Assets, Continuing Operations	[1]	877,353	1,122,261
International [Member]
Segment Reporting Information [Line Items]
Assets, Continuing Operations	[1]	$ 550,743	$ 563,864
Assets, Total [Member]
Segment Reporting Information [Line Items]
Concentration of risk, percentage		10.00%	0.00%
IRELAND
Segment Reporting Information [Line Items]
Assets, Continuing Operations		$ 152,600	$ 203,200
United States
Segment Reporting Information [Line Items]
Assets, Continuing Operations		854,100	1,057,600
Discontinued Operations, Disposed of by Sale [Member]
Segment Reporting Information [Line Items]
Disposal Group, Including Discontinued Operation, Assets		$ 0	$ 75,252

[1] North America contains assets from the United States of $854.1 million and $1,057.6 million as of September 30, 2017 and December 31, 2016, respectively. International contains assets from Ireland of $152.6 million and $203.2 million as of September 30, 2017 and December 31, 2016, respectively. There were no other individual countries that represented more than 10% of consolidated total assets as of September 30, 2017 and December 31, 2016