Summary of Significant Accounting Policies - Reconciliation Between Basic and Diluted Earnings Per Share (Details)	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reconciliation between basic and diluted earnings per share [Abstract]
Weighted average common shares outstanding for the year (in shares)	32,463,634	32,050,538	31,708,949
Dilutive impact of stock equivalents (in shares)	303,319	347,827	436,824
Weighted average common and common equivalent shares for the year (in shares)	32,766,953	32,398,365	32,145,773
Common shares outstanding at December 31 (in shares)	32,468,752	32,184,110	31,728,969
Weighted average anti-dilutive shares excluded from the computation of diluted earnings per share (in shares)	273,802	402,485	189,768

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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-Name Accounting Standards Codification

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+ Details

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References+ Details

- Definition

The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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+ Details