Earnings Per Share Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Income (Loss) from Continuing Operations Attributable to Parent	$ 4,127	$ 5,683	$ 5,200	$ 4,571	$ 5,434	$ 4,444	$ 4,557	$ 6,418	$ 19,581	$ 20,853	$ 15,446
Earnings Allocated to Unvested Restricted Stock									(89)	(257)	(295)
Income from Continuing Operations Less Earnings Allocated to Unvested Restricted Stock									19,492	20,596	15,151
Income from discontinued operations									0	0	392
Income attributable to discontinued operations									0	0	(8)
Income From Discontinued Operations Less Earnings Allocated to Unvested Restricted Stock									0	0	384
Income Attributable to Continuing Operations Diluted									19,492	20,596	15,151
Income Attributable to Discontinuing Operations Diluted									$ 0	$ 0	$ 384
Weighted Average Number of Shares Outstanding, Basic									16,515,000	17,791,000	18,108,000
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units									$ 454	$ 246	$ 149
Incremental common shares attributable to dilutive effect of conversion of debt securities									491,000	276,000	0
Weighted average number of common and common equivalent shares outstanding for diluted EPS computation									17,460,000	18,313,000	18,257,000
Basic earnings per common share:
Basic earnings per share from continuing operations (in dollars per share)									$ 1.18	$ 1.16	$ 0.84
Discontinued operations (in dollars per share)									0.00	0.00	0.02
Basic earnings per common share (in dollars per share)	$ 0.25	$ 0.34	$ 0.31	$ 0.27	$ 0.32	$ 0.25	$ 0.25	$ 0.35	1.18	1.16	0.86
Diluted earnings per common share:
Diluted earnings per share from continuing operations (in dollars per share)									1.12	1.12	0.83
Discontinued operations (in dollars per share)									0.00	0.00	0.02
Diluted earnings per common share (in dollars per share)	$ 0.22	$ 0.33	$ 0.30	$ 0.27	$ 0.31	$ 0.24	$ 0.24	$ 0.34	$ 1.12	$ 1.12	$ 0.85