Acquisition (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended			0 Months Ended	6 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Apr. 08, 2013 Commonwealth Acquisition Holdings, LLC [Member] Chesapeake [Member]	Sep. 30, 2013 Commonwealth Acquisition Holdings, LLC [Member] Chesapeake [Member]	Sep. 30, 2013 Commonwealth Acquisition Holdings, LLC [Member] Chesapeake [Member] Selling, General and Administrative Expenses [Member]	Sep. 30, 2013 Commonwealth Acquisition Holdings, LLC [Member] Chesapeake [Member] Selling, General and Administrative Expenses [Member]
Business Acquisition [Line Items]
Business combination, adjusted purchase price						$ 2,623
Business combination, holdback incurred						250
Business combination, transaction costs	0	0	257	46				0	151
Business combination, net sales of acquiree since acquisition date, actual							5,347
Intangible assets acquired						1,160
Intangible assets acquired, weighted average useful life						13 years
Goodwill	$ 7,186		$ 7,186		$ 6,511	$ 675