Schedule II Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 20,392	$ 21,238	$ 26,815
Acquired by Purchase or Merger	0	56	73
Charged to Cost and Expense	6,394	5,162	5,693
Reductions	(6,204)	(6,481)	(10,013)
Other	(218)	417	(1,330)
Balance at End of Year	20,364	20,392	21,238
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	18,887	20,855	35,486
Acquired by Purchase or Merger	0	0	0
Additions	0	0	0
Reductions	(3,333)	(1,968)	(14,631)
Other	0	0	0
Balance at End of Year	15,554	18,887	20,855
LIFO Reserve [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	55,506	55,345	45,742
Acquired by Purchase or Merger	0	0	0
Charged to Cost and Expense	0	161	9,603
Reductions	(2,484)	0	0
Other	0	0	0
Balance at End of Year	$ 53,022	$ 55,506	$ 55,345