Stockholders' Equity and Earnings Per Share (Weighted Average Number of Shares Outstanding Reconciliation) (Details) - $ / shares	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Basic weighted average shares outstanding (in shares)	13,518,000	13,579,000	13,813,000	13,786,000	13,714,000	13,704,000	13,695,000	13,683,000	13,800,000	13,689,000	13,726,000	13,694,000	13,690,000	13,699,000	13,673,000
Dilutive effect of share-based compensation awards (in shares)													36,000	32,000	12,000
Diluted weighted average shares outstanding (in shares)	13,625,000	13,595,000	13,826,000	13,786,000	13,844,000	13,713,000	13,704,000	13,692,000	13,813,000	13,693,000	13,731,000	13,697,000	13,726,000	13,731,000	13,685,000
Earnings Per Share, Basic and Diluted [Abstract]
Basic and diluted earnings per share, continuing operations (in dollars per share)	$ 0.98	$ 0.04	$ 0.14	$ (0.05)	$ 0.84	$ 0.66	$ 0.12	$ 0.07	$ 0.09	$ 0.19	$ 0.13	$ 0.84	$ 1.10	$ 1.68	$ 1.32
Basic and diluted earnings per share, discontinued operations (in dollars per share)	(1.52)	(0.20)	(0.18)	(0.20)	0.17	(0.14)	(0.20)	(0.22)	(0.38)	(0.43)	(0.58)	(0.56)	(2.09)	(0.39)	(0.16)
Basic and diluted earnings per share (in dollars per share)	$ (0.54)	$ (0.16)	$ (0.04)	$ (0.25)	$ 1.01	$ 0.52	$ (0.08)	$ (0.15)	$ (0.29)	$ (0.24)	$ (0.45)	$ 0.28	$ (0.99)	$ 1.29	$ 1.16