Summary of Significant Accounting Policies (Receivables) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Allowance for Doubtful Accounts Receivable
Balance at beginning of year	$ 298		$ 441		$ 291
Provision and reserve adjustments	138		91		227
Write-offs less recoveries	(30)		(274)		(77)
Reserve acquired					0
Balance at end of year	488		298		441
Racine Federated Inc
Allowance for Doubtful Accounts Receivable
Reserve acquired	82	[1]
Remag Ag
Allowance for Doubtful Accounts Receivable
Reserve acquired			$ 40	[1]

[1] The reserve increased $82,000 in 2012 related to the acquisition of Racine Federated, Inc. (“Racine Federated”). Refer to Note 3 “Acquisitions” for a description of the acquisition.