Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net income (loss)	$ 1,891	$ 4,251	$ (68)	$ 3,611
Other comprehensive income (loss):
Unrealized (loss)/gain on effective portion of fuel hedges, net of tax of $951 and $700 in 2013 and $274 and $158 in 2012, respectively	(1,526)	713	(1,122)	(412)
Reclassification of fuel hedge losses/(gains) into statement of operations, net of tax of $108 and $0 in 2013 and $228 and $596 in 2012, respectively	282	(594)	1	(1,551)
Total other comprehensive (loss) income	(1,244)	119	(1,121)	(1,963)
Comprehensive income (loss)	$ 647	$ 4,370	$ (1,189)	$ 1,648