Debt (Additional Information) (Details)			3 Months Ended			6 Months Ended
	Jun. 18, 2015 USD ($)	Jan. 22, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 17, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jul. 13, 2011 USD ($)
Debt Instrument [Line Items]
Maximum borrowing capacity										$ 265,000,000
Revolving credit outstanding borrowings			$ 180,000,000			$ 180,000,000			$ 0
Actual leverage ratio			1.34			1.34
Actual ICR			30.68			30.68
Capitalized debt issuance costs			$ 1,600,000			$ 1,600,000
Amortization expense, debt issue costs			100,000		$ 100,000	200,000
Capitalized debt issuance costs, net			2,100,000			2,100,000		$ 500,000
Repayment of debt principal						$ 5,131,000	$ 7,651,000
Capital lease, expiration date						2021
Capital lease obligation			6,100,000			$ 6,100,000
Amortization expense related to the capital lease			100,000		100,000	200,000	200,000
Capital lease accumulated depreciation			1,800,000			1,800,000			$ 1,600,000
Interest expense on outstanding debt			1,100,000		500,000	1,900,000	1,000,000
Unused commitment fee			100,000		100,000	100,000	200,000
Interest expense on capital lease			100,000		$ 100,000	200,000	300,000
Credit Agreement [Member]
Debt Instrument [Line Items]
Variable rate lower range basis spread	37.50%
Variable rate higher range basis spread	75.00%
Line of credit, base reference rate description	The base reference rate is the greater of the prime rate; federal funds effective rate plus 50 basis points; or adjusted 1-month LIBOR plus 100 basis points.
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Derivative Liability			300,000			300,000
Bank Term Loan [Member]
Debt Instrument [Line Items]
Revolving credit outstanding borrowings			125,000,000			125,000,000
Term loan debt			55,000,000			$ 55,000,000
Interest rate spread over variable rate (percent)						1.625%
Bank Term Loan [Member] | One Month LIBOR [Member]
Debt Instrument [Line Items]
Interest rate spread over variable rate (percent)						0.1875%
Bank Term Loan [Member] | Interest Rate Swap [Member]
Debt Instrument [Line Items]
Term loan debt			32,500,000			$ 32,500,000
Amended Credit Facility [Member]
Debt Instrument [Line Items]
Credit agreement, agreement period	5 years
Maximum borrowing capacity	$ 350,000,000
Expansion option	$ 50,000,000
Revolving credit outstanding borrowings			125,000,000			125,000,000
Payments commencement date	Sep. 30, 2015
Leverage ratio	3.25
One-time leverage ratio maximum option	3.50
ICR covenant limit	3.00
Repayment of debt principal						5,000,000	$ 7,500,000
Required payment on debt obligation within the next 12 months						2,800,000
Maximum cash dividends and other restricted payments allowed	$ 10,000,000
Maximum leverage ratio before dividend payment limitations apply	2.00
Amended Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Unused commitment fee percentage	0.20%
Amended Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Unused commitment fee percentage	0.30%
Amended Credit Facility [Member] | Federal Funds Rate [Member]
Debt Instrument [Line Items]
Variable rate lower range basis spread	0.50%
Amended Credit Facility [Member] | One Month LIBOR [Member]
Debt Instrument [Line Items]
Variable rate higher range basis spread	1.00%
Amended Credit Facility [Member] | Bank Term Loan [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 55,000,000
Amended Credit Facility [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 295,000,000
Eurocurrency loans [Member] | Credit Agreement [Member]
Debt Instrument [Line Items]
Line of credit, LIBOR rate, minimum spread	137.50%
Line of credit, LIBOR rate, maximum spread	175.00%
Revolving Credit Facility [Member] | Arlon [Member]
Debt Instrument [Line Items]
Proceeds from line of credit		$ 125,000,000		$ 125,000,000
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Revolving credit outstanding borrowings			0			0
Irrevocable standby letters of credit			$ 1,400,000			$ 1,400,000