Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2013	Jun. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share
Unvested common shares included in calculation of weighted average shares outstanding	611				547								611	547	582
Income (loss)
Income from continuing operations	$ (3,324)	$ 625	$ 2,955	$ 3,193	$ 1,623	$ 2,730	$ 5,295	$ 942	$ 6,148	$ 6,237	$ 6,773	$ 8,967	$ 3,449	$ 10,590	$ 75,555
Effect of the Notes													344	677	962
Diluted income from continuing operations													3,449	10,590	76,517
Diluted income (loss) from discontinued operations		$ (1,383)									$ (3,683)		$ (5,789)	$ 11,717	$ (3,381)
Shares
Income from continuing operations (in shares)													48,277	47,952	42,161
Effect of the Notes (in shares)													986	2,182	2,873
Diluted income from continuing operations (in shares)													48,277	50,134	45,034
Diluted income (loss) from discontinued operations (in shares)													48,277	50,134	45,034
Per Share
Income from continuing operations (in dollars per share)		$ 0.01	$ 0.06	$ 0.07	$ 0.04	$ 0.05	$ 0.11	$ 0.02	$ 0.13	$ 130.00	$ 0.14	$ 0.19	$ 0.07	$ 0.23	$ 1.79
Diluted income from continuing operations (in dollars per share)		$ 0.01	$ 0.06	$ 0.07	$ 0.03	$ 0.05	$ 0.10	$ 0.02	$ 0.13	$ 0.13	$ 0.14	$ 0.19	$ 0.07	$ 0.23	$ 1.70
Diluted income (loss) from discontinued operations (in dollars per share)		$ (0.03)	$ (0.03)	$ (0.02)		$ 0.27	$ (0.01)	$ (0.01)	$ (0.05)	$ (0.03)	$ 0.07	$ 0.23	$ (0.12)	$ 0.23	$ (0.08)