Property Assets Property Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property Assets [Abstract]
Furniture and equipment	$ 512,056	$ 511,527
Building and leasehold improvements	251,975	269,522
Land and land improvements	6,737	6,747
Transportation equipment	3,765	10,585
Construction in progress	3,540	10,193
Total property assets	778,073	808,574
Accumulated depreciation of property assets	(551,750)	(525,673)
Property assets, net of accumulated depreciation of $551,750 and $525,673 in 2018 and 2017, respectively	226,323	282,901
Capitalized software costs included in construction in progress	1,900	7,300
Cost of internally developed software placed in service	$ 9,700	$ 32,100	$ 84,500