Debt (Additional Information) (Details)			3 Months Ended			6 Months Ended
	Jun. 18, 2015 USD ($)	Jan. 22, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Jul. 13, 2011 USD ($)
Debt Instrument [Line Items]
Maximum borrowing capacity									$ 265,000,000
Interest expense on outstanding debt			$ 900,000	$ 1,100,000		$ 1,800,000	$ 1,900,000
Unused commitment fee			100,000	100,000		200,000	100,000
Capitalized debt issuance costs, net			1,900,000			1,900,000
Amortization expense, debt issue costs			100,000	100,000		200,000	200,000
Repayment of debt principal						$ 1,516,000	5,131,000
Capital lease, expiration date						2021
Capital lease obligation			5,800,000			$ 5,800,000
Amortization expense related to the capital lease			100,000	100,000		200,000	200,000
Capital lease accumulated depreciation			3,400,000			3,400,000		$ 3,300,000
Interest expense on capital lease			$ 100,000	$ 100,000		$ 200,000	200,000
Debt instrument, leverage ratio, maximum			2.00			2.00
Maximum
Debt Instrument [Line Items]
Dividends						$ 10,000,000.0
Credit Agreement
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.
Bank Term Loan
Debt Instrument [Line Items]
Revolving credit outstanding borrowings			$ 125,000,000			$ 125,000,000
Term loan debt			52,300,000			$ 52,300,000
Interest rate spread over variable rate (percent)						1.50%
Bank Term Loan | LIBOR
Debt Instrument [Line Items]
Interest rate spread over variable rate (percent)						0.50%
Amended Credit Facility
Debt Instrument [Line Items]
Credit agreement, agreement period (in years)	5 years
Maximum borrowing capacity	$ 350,000,000
Expansion option	$ 50,000,000
Leverage ratio	3.25
One-time leverage ratio maximum option	3.50
ICR covenant limit	3.00
Payments commencement date						Sep. 30, 2015
Repayment of debt principal						$ 1,400,000	$ 5,000,000
Required payment on debt obligation within the next 12 months						4,100,000
Amended Credit Facility | Minimum
Debt Instrument [Line Items]
Unused commitment fee percentage	0.20%
Amended Credit Facility | Maximum
Debt Instrument [Line Items]
Unused commitment fee percentage	0.30%
Amended Credit Facility | Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Variable rate lower range basis spread	0.50%
Amended Credit Facility | LIBOR
Debt Instrument [Line Items]
Variable rate higher range basis spread	1.00%
Amended Credit Facility | Bank Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 55,000,000
Amended Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 295,000,000
Eurocurrency loans | Credit Agreement
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 | Arlon
Debt Instrument [Line Items]
Proceeds from line of credit		$ 125,000,000			$ 125,000,000
Standby Letters of Credit
Debt Instrument [Line Items]
Irrevocable standby letters of credit			1,200,000			1,200,000		1,200,000.0
Revolving credit outstanding borrowings			$ 0			$ 0		$ 0