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Employee Retirement and Benefit Plans	12 Months Ended
Employee Retirement and Benefit Plans	Dec. 31, 2013
Employee Retirement and Benefit Plans	(11) Employee Retirement and Benefit Plans We sponsor a defined contribution 401(k) plan for all employees. Each participant may contribute certain amounts of eligible compensation. We make a matching contribution to the plan. Our contributions under this plan were $561,000, $533,000 and $487,000 in 2013, 2012 and 2011, respectively.