Leases - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Leases [Abstract]
Operating leases, rent expense	$ 1,900,000	$ 2,200,000	$ 2,300,000
Capital leased assets, gross	2,300,000
Accumulated depreciation and amortization	$ 125,233