Earnings Per Share and Capital Structure Computation of Basic and Diluted Earnings per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Net income (loss) available to common shareholders	$ (254)	$ 2,570
Weighted average common shares outstanding - Basic	39,235	39,420
Dilutive effect of stock-based awards	0	350
Weighted average common shares outstanding - Diluted	39,235	39,770
Earnings (loss) per common share - Basic	$ (0.01)	$ 0.07
Earnings (loss) per common share - Diluted	$ (0.01)	$ 0.06

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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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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