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Stock Buy Back Plans	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Stock Buy Back Plans	NOTE 16. Stock Buy Back Plans On February 2, 2016, our Board of Directors authorized the purchase of up to $100 million of our Class A Common Stock. This authorization expired on December 31, 2016. We purchased 2,672,227 shares under this authorization during the year ended December 31, 2016, completing the authorization.  There was no purchase authorized in 2018 and 2017.   We purchased 87,381 shares for $4.3 million and 77,988 shares for $3.4 million during the years ended December 31, 2018 and 2017, respectively, related to employee withholding upon vesting of restricted stock.

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- Definition

The entire disclosure for treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-URI http://asc.fasb.org/subtopic&trid=2208821

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