8. Earnings Per Share (Details) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Basic weighted average shares outstanding	28,826	28,538	28,809	28,516
Effect of potentially dilutive stock options and restricted stock awards	266	330	267	327
Diluted weighted average common shares	29,092	28,868	29,076	28,843
Anti-dilutive shares	107	92	94	92