Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Allowances for contract receivables	$ 2,243	$ 1,996
Allowances for employee advances and miscellaneous receivables	692	402
Accumulated amortization on intangible assets	$ 33,973	$ 32,717
Common stock, par value (usd per share)	$ 0us-gaap_CommonStockNoParValue	$ 0us-gaap_CommonStockNoParValue
Common stock, stated value per share (usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	50,000,000us-gaap_CommonStockSharesAuthorized	50,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued (shares)	26,762,861us-gaap_CommonStockSharesIssued	29,367,439us-gaap_CommonStockSharesIssued
Common stock, shares outstanding (shares)	26,762,861us-gaap_CommonStockSharesOutstanding	29,367,439us-gaap_CommonStockSharesOutstanding

Allowances for employee advances and miscellaneous receivables.

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Face amount per share of no-par value common stock.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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