Employee Retirement Plans (Details 6) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined contribution plan
Company's matching contributions	$ 213	$ 198	$ 140
Non-discretionary employer contributions	807	871
Non-qualified plan
Employee retirement plans
Expense	450	471
Amount accrued	$ 1,105	$ 497