Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	3 Months Ended		12 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2013 Facility Closure [Member]	Mar. 31, 2013 Facility Closure [Member]	Dec. 31, 2012 Lipson Associates, Inc. and Laga, Inc. [Member]
Lipson Associates, Inc. and Laga, Inc. [Abstract]
Acquisition Date					Oct. 19, 2011
Purchase price					$ 24,562
Cash paid					27,011
Cash received for net working capital adjustment					2,449
Restructuring Cost and Reserve [Line Items]
Lease expiration date		Dec. 31, 2014
Summary of reserve activity for facility closure costs [Roll Forward]
Beginning of Period			272	324
Adjustments			(141)	(31)
Payments			(20)	(21)
End of Period			111	272
Restructuring reserve included in accrued expenses	$ 111