Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Allowance for Doubtful Accounts Receivable, Current	$ 23,011	$ 24,872
Stockholders' Equity Attributable to Parent [Abstract]
Preferred Stock, No Par Value (USD per share)	$ 0us-gaap_PreferredStockNoParValue	$ 0us-gaap_PreferredStockNoParValue
Preferred Stock, Shares Authorized	1,000,000us-gaap_PreferredStockSharesAuthorized	1,000,000us-gaap_PreferredStockSharesAuthorized
Preferred Stock, Shares Issued	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Common Stock, Par or Stated Value Per Share (USD per share)	$ 1.25	$ 1.25
Common Stock, Shares Authorized	125,000,000us-gaap_CommonStockSharesAuthorized	125,000,000us-gaap_CommonStockSharesAuthorized
Common Stock, Shares, Issued	79,238,759us-gaap_CommonStockSharesIssued	78,618,517us-gaap_CommonStockSharesIssued
Common Stock, Shares, Outstanding	64,632,400us-gaap_CommonStockSharesOutstanding	64,068,047us-gaap_CommonStockSharesOutstanding
Treasury Stock, Shares	14,606,359us-gaap_TreasuryStockShares	14,550,470us-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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