Restructuring - Restructuring Reserve (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	$ 3,357
Restructuring and Related Cost, Cost Incurred to Date	3,312
Restructuring and Related Cost, Expected Cost Remaining	45
Restructuring Reserve [Roll Forward]
Accrual additions	275	428
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Accrued restructuring balance as of December 31, 2014	739
Accrual additions	275
Cash payments	(328)	(134)
Accrued restructuring balance as of March 31, 2015	686
Relocation of Machining Operations from Savannah Facility [Member]
Restructuring Cost and Reserve [Line Items]
Integration expense resulting from reorganization activities	67
Relocation of Machining Operations from Savannah Facility [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	47
Restructuring and Related Cost, Cost Incurred to Date	47
Restructuring and Related Cost, Expected Cost Remaining	0
Precise Machine [Member] | Lease Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	124
Restructuring and Related Cost, Cost Incurred to Date	124
Restructuring and Related Cost, Expected Cost Remaining	0
Precise Machine [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	615
Restructuring and Related Cost, Cost Incurred to Date	615
Restructuring and Related Cost, Expected Cost Remaining	0
Relocation of Machining Parts Operations from St. Charles Facility [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	394
Restructuring and Related Cost, Cost Incurred to Date	349
Restructuring and Related Cost, Expected Cost Remaining	45
Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	115
Restructuring and Related Cost, Cost Incurred to Date	115
Restructuring and Related Cost, Expected Cost Remaining	0
Other Expense [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost	2,062
Restructuring and Related Cost, Cost Incurred to Date	2,062
Restructuring and Related Cost, Expected Cost Remaining	0
Selling, General and Administrative Expenses [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	275	428
Selling, General and Administrative Expenses [Member] | Relocation of Machining Operations from Savannah Facility [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0	41
Selling, General and Administrative Expenses [Member] | Precise Machine [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	0	93
Selling, General and Administrative Expenses [Member] | Relocation of Machining Parts Operations from St. Charles Facility [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	171	0
Selling, General and Administrative Expenses [Member] | Other Expense [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 104	$ 294