Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement [Abstract]
Amortization of non-qualified employee benefit plan liability, net of taxes of $217 and $108 for the three months ended and $433 and $216 for the six months ended June 30, 2015 and 2014, respectively	$ (217)	$ (108)	$ (433)	$ (216)