Related Party Transactions (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
TDR [Member]
Related Party Transaction [Line Items]
Sales total	$ 1,551,000	$ 236,000	$ 328,000
Recognized gains, net	823,000	67,000	18,000
Related party expense	608,000	534,000	413,000
Other operating revenue	3,836,000	3,965,000	2,885,000
Notes receivable		2,600,000
Receivables of leases and revenue sales	2,074,000	3,697,000
Interest receivable on note	31,000	31,000
Purchased property including land and building			1,274,000
Principal Stockholder [Member]
Related Party Transaction [Line Items]
Lease annual rent payments	1.00
Leasehold improvements to land total	6,500,000
Related party expense	$ 62,000