Discontinued Operations - Income Statement Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Labor	$ 62,930	$ 57,431	$ 125,968	$ 116,583
Production and distribution	27,427	35,088	57,306	70,781
Advertising, selling, general and administrative	10,934	10,422	23,577	22,170
Depreciation, software and intangible asset amortization	3,201	3,195	6,237	6,175
Other, net	111	683	(624)	281
Trillium Software
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	12,711	13,170	23,871	25,028
Labor	5,202	5,005	10,503	10,516
Production and distribution	156	318	412	584
Advertising, selling, general and administrative	3,337	2,373	5,764	4,725
Depreciation, software and intangible asset amortization	589	456	1,101	913
Other, net	(385)	835	178	838
Income from discontinued operations before income taxes	3,812	4,183	5,913	7,452
Income tax expense	1,163	1,665	1,920	2,916
Net income from discontinued operations	$ 2,649	$ 2,518	$ 3,993	$ 4,536