Earnings per Share (Schedule of Computation of Basic and Diluted Earnings per Share) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Income (loss) from continuing operations	$ 220	$ 13,632	$ 4,087	$ 5,537	$ (95,708)	$ 9,571	$ 6,431	$ (2,086)	$ 23,476	$ (81,792)	$ (5,629)
Loss from discontinued operations	0	0	0	(28)	(1)	(31)	0	0	(28)	(32)	(4)
Net income (loss)	$ 220	$ 13,632	$ 4,087	$ 5,509	$ (95,709)	$ 9,540	$ 6,431	$ (2,086)	$ 23,448	$ (81,824)	$ (5,633)
Weighted average shares outstanding (in shares)									31,233	31,066	30,930
Common stock options and restricted stock (in shares)									312	0	0
Weighted average shares and conversions (in shares)									31,545	31,066	30,930