Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ 1,824	$ 2,911	$ 3,987	$ 4,826
Net Income Allocated to Class A Common Stock	1,806	2,882	3,947	4,777
Net Income Allocated to Class B Common Stock	$ 18	$ 29	$ 40	$ 49
Common Class A [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Weighted Average Shares Outstanding, Basic	49,080	49,019	49,080	48,962
Weighted Average Shares Outstanding, Diluted	49,080	49,030	49,080	48,972
Basic earnings per share	$ 0.03	$ 0.06	$ 0.08	$ 0.10
Diluted earnings per share	$ 0.03	$ 0.06	$ 0.08	$ 0.10
Common Stock Class B [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Weighted Average Shares Outstanding, Basic and Diluted	1,002	1,002	1,002	1,002
Basic earnings per share	$ 0.02	$ 0.03	$ 0.04	$ 0.05
Diluted earnings per share	$ 0.02	$ 0.03	$ 0.04	$ 0.05