Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Allowance for doubtful accounts	$ 4,352	$ 6,136
Accumulated amortization of other intangible assets	$ 17,042	$ 16,232
STOCKHOLDERS’ EQUITY:
Common stock, par value (dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (shares)	100,000,000us-gaap_CommonStockSharesAuthorized	100,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued (shares)	73,218,000us-gaap_CommonStockSharesIssued	72,878,000us-gaap_CommonStockSharesIssued
Common stock, shares outstanding (shares)	73,218,000us-gaap_CommonStockSharesOutstanding	72,878,000us-gaap_CommonStockSharesOutstanding
Common stock in treasury (shares)	1,759,000us-gaap_TreasuryStockShares	1,821,000us-gaap_TreasuryStockShares

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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