The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Subsequent Events (Details) (USD $)	12 Months Ended			1 Months Ended
Subsequent Events (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jan. 31, 2013 Entities related to Keymark	Jul. 31, 2012 Entities related to Keymark	Feb. 28, 2013 Common stock repurchase	Jan. 31, 2013 Repayment of loan Entities related to Keymark	Feb. 28, 2013 Acquisition ShearBrace
Subsequent Events
Common stock repurchase, authorized amount						$ 50,000,000
Loan repayments by related parties	1,698,000	552,000	50,000	700,000	1,700,000		700,000
Acquisition cost								$ 5,300,000