Stockholders' Equity and Earnings Per Share (Weighted Average Number of Shares Outstanding Reconciliation) (Details) - $ / shares shares in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Basic weighted average shares outstanding (in shares)	6,924	6,830
Dilutive effect of restricted stock awards (in shares)	36	43
Diluted weighted average shares outstanding (in shares)	6,960	6,873
Basic earnings per share:
Continuing operations (USD per share)	$ 5.02	$ 4.17
Discontinued operations (USD per share)	0.00	0.27
Basic earnings per share (USD per share)	5.02	4.44
Diluted earnings per share:
Continuing operations (USD per share)	5.00	4.14
Discontinued operations (USD per share)	0.00	0.27
Diluted earnings per share (USD per share)	$ 5.00	$ 4.41

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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