Acquisitions (Assets Acquired and Liabilities Assumed) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended			0 Months Ended			2 Months Ended		2 Months Ended		2 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	May 01, 2013 Pipe and Foundation Group		May 01, 2013 Pipe and Foundation Group Trademarks	Jun. 30, 2013 Pipe and Foundation Group Customer relationships	May 01, 2013 Pipe and Foundation Group Customer relationships	Jun. 30, 2013 Pipe and Foundation Group Developed technology	May 01, 2013 Pipe and Foundation Group Developed technology	Jun. 30, 2013 Pipe and Foundation Group Other intangibles	May 01, 2013 Pipe and Foundation Group Other intangibles
Fair value of consideration transferred:
Cash	$ 178,309	$ 0		$ 178,309
Preliminary allocation of consideration transferred to net assets acquired:
Accounts receivable				17,695	[1]
Inventories				25,948
Property, plant and equipment				31,261
Intangible assets:
Intangible assets						5,200		57,600		18,900		300
Current liabilities				(10,595)
Other liabilities				(26)
Total identifiable net assets				146,283
Goodwill	62,016		29,990	32,026	[2]
Consideration transferred				178,309
Fair value of accounts receivable acquired				17,695
Gross contractual amount of acquired receivables				17,772
Amount of acquired receivables expected to be uncollectible				$ 0
Weighted average life							15 years		15 years		2 years

[1] The fair value of accounts receivable acquired is $17,695, with the gross contractual amount being $17,772. The Company expects $77 to be uncollectible.

[2] The goodwill recognized is primarily attributable to synergies from the Company's vinyls integration strategy expected to arise from the Company's PFG acquisition, as well as intangible assets that do not qualify for separate recognition. The goodwill is expected to be deductible for income tax purposes. The Company has not yet completed the process of assigning the goodwill to its reporting units.