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Goodwill and Other Intangible Assets (Details 1) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Mar. 16, 2015	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill
Number of reporting units			1
Discount rate		11.50%	14.00%
Goodwill impairment			$ 34,510	$ 38,669
Accumulated goodwill impairment loss			283,100	248,600	$ 209,900
Finite-lived intangible assets, amortization			$ 700	$ 800	$ 700
Scenario, previously reported
Goodwill
Number of reporting units			2
3Q Digital Inc | Customer relationships
Goodwill
Finite-lived intangible asset, useful life	7 years
3Q Digital Inc | Tradenames and trademarks
Goodwill
Finite-lived intangible asset, useful life	2 years
Minimum
Goodwill
Finite-lived intangible asset, useful life				2 years
Maximum
Goodwill
Finite-lived intangible asset, useful life				10 years
Customer Interaction
Goodwill
Goodwill impairment				$ 209,900
Income tax benefit from impairment of goodwill				36,800
Net income impact of goodwill impairment				$ 173,100

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