Restructuring - Restructuring Reserve (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date			$ 2,740
Restructuring Reserve [Roll Forward]
Accrual additions	765	0	2,288	0
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Accrued restructuring balance as of December 31, 2013			422
Accrual additions			2,281
Cash payments	(253)		(1,441)
Accrued restructuring balance as of September 30, 2014	1,262		1,262
Precise Machine [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date			615
Precise Machine [Member] | Lease Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date			124
Relocation of Machining Operations from Savannah Facility [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date			47
Other Expense [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date			$ 1,954