Acquisition (Narrative) (Details) (USD $)	1 Months Ended	3 Months Ended	6 Months Ended
	Jul. 22, 2011	Dec. 31, 2011	Dec. 31, 2011
Business Acquisition [Line Items]
Purchase price	$ 80,000,000
Number of days for working capital adjustment	60
Accrued working capital adjustment amount	100,000
Cash paid to acquire entity	72,000,000
Remainder of fixed price payable in future	8,000,000
Acquisition earn-out contingent payable	57,000,000
Financial targets achievement period end		June 30, 2014	June 30, 2014
Preliminary valuation of contingent consideration	22,100,000
Goodwill	79,757,000
Approximate goodwill amount deductible for tax purposes	35,600,000
Intangible assets	20,600,000
Expense recognized in SG&A in connection with acquisition		900,000	900,000
Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets	19,200,000
Intangible assets useful life, years	10
Technology [Member]
Business Acquisition [Line Items]
Intangible assets	$ 1,400,000
Intangible assets useful life, years	4