Share-Based Payments and Other Executive Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended			0 Months Ended	12 Months Ended				12 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 02, 2011 The Incentive Plan [Member]	Dec. 31, 2013 The Incentive Plan [Member]	Jun. 01, 2011 The Incentive Plan [Member]	Dec. 31, 2013 Common Stock [Member]	Dec. 31, 2013 Stock options, restricted stock and RSU granted [Member]	Dec. 31, 2013 Restricted Stock and RSU Granted [Member]	Dec. 31, 2012 Restricted Stock and RSU Granted [Member]	Dec. 31, 2013 Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock par value (in dollars per share)	$ 1	$ 1		$ 1.00
Increase in authorized shares under incentive plan (in shares)				700,000
Shares authorized under the plan (in shares)				2,200,000		1,500,000
Expiration period after grant issued					10 years
Shares available for grant (in shares)	336,574						1,078,455	741,881
Restricted stock expired/forfeited/cancelled (in shares)	(114,750)								(147,838)
Share-based compensation cost	$ 1,648	$ 3,034	$ 1,850
Restricted stock granted (in shares)	585,036								95,242
Weighted average grant date fair value (in dollars per share)	$ 8.75								$ 19.68	$ 15.38
Weighted average fair value of units granted (in dollars per share)	$ 8.75	$ 7.98	$ 11.63						$ 21.85		$ 21.95
Unrecognized compensation expense											1,598
Weighted average expense recognition period (in years)	2 years 4 months 24 days										1 year 10 months 6 days
Unrecognized compensation expense for unvested stock options	$ 4,787
Weighted average remaining contractual life of stock options	9 years 9 months 18 days
Maximum percentage of qualified remuneration											50.00%
Stock units outstanding	36,257	30,929	23,053