Debt (Additional Information) (Details)			3 Months Ended			9 Months Ended
	Jun. 18, 2015 USD ($)	Jan. 22, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 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			$ 500,000	$ 900,000		$ 2,300,000	$ 2,700,000
Unused commitment fee			100,000	100,000		300,000	200,000
Capitalized debt issuance costs, net			1,700,000			1,700,000
Amortization expense, debt issue costs			$ 200,000	100,000		400,000	300,000
Repayment of debt principal						$ 102,580,000	5,886,000
Debt instrument, leverage ratio, maximum			2.00			2.00
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		300,000	300,000
Capital lease accumulated depreciation			3,500,000			3,500,000		$ 3,300,000
Interest expense on capital lease			100,000	$ 100,000		300,000	300,000
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			25,000,000			25,000,000
Term loan debt			51,200,000			$ 51,200,000
Interest rate spread over variable rate (percent)						1.50%
Bank Term Loan | LIBOR
Debt Instrument [Line Items]
Interest rate spread over variable rate (percent)						0.5625%
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						$ 102,400,000	$ 5,700,000
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