Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ 1,307	$ 403	$ 2,163	$ 1,915
Net Income Allocated to Class A Common Stock	1,293	399	2,141	1,895
Net Income Allocated to Class B Common Stock	$ 14	$ 4	$ 22	$ 20
Common Class A [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Weighted Average Shares Outstanding, Basic	49,080	48,963	49,080	48,961
Weighted Average Shares Outstanding, Diluted	49,080	48,989	49,080	48,997
Basic earnings per share	$ 0.03	$ 0.01	$ 0.05	$ 0.04
Diluted earnings per share	$ 0.03	$ 0.01	$ 0.05	$ 0.04
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	$ 0.01	$ 0.00	$ 0.02	$ 0.02
Diluted earnings per share	$ 0.01	$ 0.00	$ 0.02	$ 0.02