Schedule V. Valuation and Qualifying Accounts (Details) (Allowance for Doubtful Accounts [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance, January 1 Allowance for Doubtful Accounts	$ 29	$ 0
Additions	0	29
Deletions	(23)	0
Balance, December 31 Allowance for Doubtful Accounts	$ 6	$ 29