Common Stock and Treasury Stock (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Class A Common Stock [Member]
Common Stock [Line Items]
Balance, shares	6,446,000	6,409,000
Exercised options		7,000
Conversion of shares		3,000
Issuance of restricted stock		27,000
Forfeiture of restricted stock	(1,000)
Balance, shares	6,445,000	6,446,000
Class B Common Stock [Member]
Common Stock [Line Items]
Balance, shares	843,000	816,000
Exercised options		0
Conversion of shares		(3,000)
Issuance of restricted stock		30,000
Forfeiture of restricted stock	0
Balance, shares	843,000	843,000