Supplemental Cash Flow Information (Details) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Supplemental Cash Flows, Noncash Transactions [Line Items]
Interest paid	$ 649,000	$ 589,000
Income taxes paid	100,000	0
Increase in additional paid-in capital	196,000
Directors [Member]
Supplemental Cash Flows, Noncash Transactions [Line Items]
Non-cash transaction, common stock issued	$ 27,000