Stockholders' Equity - Schedule of Capital Stock (Details) shares in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020 $ / shares shares	Jun. 30, 2019 $ / shares shares	Jun. 30, 2020 $ / shares shares	Jun. 30, 2019 $ / shares shares	Dec. 31, 2019 $ / shares shares
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	5,000	5,000	5,000	5,000	5,000
Preferred stock, shares outstanding (in shares)	0	0	0	0	0
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Class A Common Stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	70,000	70,000	70,000	70,000	70,000
Common stock, shares issued (in shares)	9,946	9,469	9,946	9,469	9,805
Treasury Stock (in shares)			365	130	365
Class A Common shares issued (in shares)	20	10	128	139
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Shares Outstanding Class B
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	30,000	30,000	30,000	30,000	30,000
Common stock, shares issued (in shares)	4,063	4,383	4,063	4,383	4,076
Class B Common converted to Class A Common (in shares)	10	2	13	39
Common stock, par value (in dollars per share) | $ / shares	$ 0.01	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Common stock, convertible conversion ratio	1	1	1	1	1