Common Stock and Earnings per Share (Weighted Average Number of Shares Outstanding Reconciliation) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Earnings Per Share, Basic and Diluted [Abstract]
Basic weighted average shares outstanding									8,384	8,383	8,328
Dilutive effect of restricted stock awards									30	25	16
Diluted weighted average shares outstanding									8,414	8,408	8,344
Continuing operations (in dollars per share)	$ 2.83	$ 1.22	$ 0.42	$ 0.57	$ 3.56	$ 0.98	$ 0.17	$ 4.78	$ 5.04	$ 9.49	$ 5.66
Discontinued operations (in dollars per share)	$ 0.00	$ 3.31	$ 2.18	$ 2.44	$ 2.92	$ 2.08	$ 2.12	$ 2.73	$ 7.93	$ 9.85	$ 3.89
Basic Earnings per Share (in dollars per share)	$ 2.83	$ 4.53	$ 2.60	$ 3.01	$ 6.48	$ 3.06	$ 2.29	$ 7.51	$ 12.97	$ 19.34	$ 9.55
Continuing operations (in dollars per share)	$ 2.81	$ 1.21	$ 0.42	$ 0.57	$ 3.56	$ 0.97	$ 0.17	$ 4.76	$ 5.02	$ 9.46	$ 5.65
Discontinued operations (in dollars per share)	$ 0.00	$ 3.31	$ 2.18	$ 2.43	$ 2.91	$ 2.08	$ 2.11	$ 2.72	$ 7.90	$ 9.82	$ 3.88
Diluted Earnings per Share (in dollars per share)	$ 2.81	$ 4.52	$ 2.60	$ 3.00	$ 6.47	$ 3.05	$ 2.28	$ 7.48	$ 12.92	$ 19.28	$ 9.53