Restructuring (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 275	$ 428
Restructuring and Related Cost, Expected Cost Remaining	45
Restructuring activities, total expense to be incurred	3,357
Restructuring and Related Cost, Cost Incurred to Date	3,312
Relocation of Machining Operations from Savannah Facility [Member]
Restructuring Cost and Reserve [Line Items]
Integration expense resulting from reorganization activities	67
Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	0
Restructuring activities, total expense to be incurred	115
Restructuring and Related Cost, Cost Incurred to Date	115
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring expense	275
Payments for Restructuring	328	134
Employee Severance [Member] | Precise Machine [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	0
Restructuring activities, total expense to be incurred	615
Restructuring and Related Cost, Cost Incurred to Date	615
Employee Severance [Member] | Relocation of Machining Operations from Savannah Facility [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	0
Restructuring activities, total expense to be incurred	47
Restructuring and Related Cost, Cost Incurred to Date	47
Employee Severance [Member] | Relocation of Machining Parts Operations from St. Charles Facility [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	45
Restructuring activities, total expense to be incurred	394
Restructuring and Related Cost, Cost Incurred to Date	349
Employee Severance [Member] | Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining	0
Restructuring activities, total expense to be incurred	2,062
Restructuring and Related Cost, Cost Incurred to Date	2,062
Selling, General and Administrative Expenses [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related expenses	275	428
Selling, General and Administrative Expenses [Member] | Employee Severance [Member] | Precise Machine [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related expenses	0	93
Selling, General and Administrative Expenses [Member] | Employee Severance [Member] | Relocation of Machining Operations from Savannah Facility [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related expenses	0	41
Selling, General and Administrative Expenses [Member] | Employee Severance [Member] | Relocation of Machining Parts Operations from St. Charles Facility [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related expenses	171	0
Selling, General and Administrative Expenses [Member] | Employee Severance [Member] | Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring related expenses	$ 104	$ 294