Debt - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended			6 Months Ended										1 Months Ended					1 Months Ended	3 Months Ended	6 Months Ended		1 Months Ended
	Nov. 30, 2010	Jun. 30, 2013	Jun. 30, 2012	Mar. 31, 2011	Jun. 30, 2013	Jun. 30, 2012	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Jul. 13, 2011	Dec. 31, 2010	Nov. 23, 2010	Dec. 31, 2012 Minimum [Member]	Jul. 31, 2011 Credit Agreement [Member]	Jun. 30, 2013 Credit Agreement [Member]	Jul. 13, 2011 Credit Agreement [Member]	Jun. 30, 2013 Bank Term Loan [Member]	Jul. 31, 2012 Bank Term Loan [Member] Cash Flow Hedging [Member] Subsequent Event [Member]	Jul. 31, 2011 Amended Credit Facility [Member]	Dec. 31, 2012 Amended Credit Facility [Member]	Jun. 30, 2013 Amended Credit Facility [Member]	Jul. 13, 2011 Amended Credit Facility [Member]	Jul. 31, 2011 Amended Credit Facility [Member] Minimum [Member]	Jul. 31, 2011 Amended Credit Facility [Member] Maximum [Member]	Jul. 13, 2011 Amended Credit Facility [Member] Federal Funds Rate [Member]	Jul. 13, 2011 Amended Credit Facility [Member] One Month LIBOR [Member]	Jul. 13, 2011 Amended Credit Facility [Member] Bank Term Loan [Member]	Jul. 13, 2011 Eurocurrency loans [Member] Credit Agreement [Member]
Debt Instrument [Line Items]
Credit agreement, maximum borrowing capacity													$ 165,000,000										$ 265,000,000					$ 100,000,000
Credit agreement, agreement period																							5 years
Credit agreement, maturity date	Nov. 23, 2014																			Jul. 13, 2016
Reduction in interest costs																							0.25%
Size of permitted acquisitions													25,000,000										100,000,000
Permitted additional indebtedness													20,000,000										120,000,000
Revolving credit outstanding borrowings											100,000,000											8,000,000
Debt Instrument Lower Range Basis Spread On Variable Rate																	0.75%									0.50%
Debt Instrument Higher Range Basis Spread On Variable Rate																	1.50%										1.00%
Line of credit, interest rate description															The base reference rate is the greater of the prime rate; federal funds effective rate plus 50 basis points; and adjusted London interbank offered (“LIBO”) rate plus 100 basis points.
Line of credit, LIBOR rate, minimum spread																													1.75%
Line of credit, LIBOR rate, maximum spread																													2.50%
Unused commitment fee percentage																								0.20%	0.35%
Payments commencement date																				Sep. 30, 2011
Covenants, leverage ratio																3.0
Leverage ratio		1.27			1.27
Fixed Charge Coverage Ratio Minimum		2.06	2.09		2.06	2.09	2.27	2.18	1.93					1.0
Capitalized debt issuance costs								100,000		700,000		1,600,000
Amortization expense, debt issue costs		100,000	100,000		200,000	400,000
Capitalized debt issuance costs, net		1,500,000			1,500,000
Amount drawn on the line of credit to fund the acquisition of Curamik				145,000,000
Repayment of debt principal					5,530,000	2,992,000															24,500,000	5,000,000
Required payment on debt obligation within the next 12 months																						15,000,000
Repayments of Lines of Credit					8,000,000
Term loan debt																		85,000,000				85,000,000
Total outstanding debt		93,000,000			93,000,000
LIBOR in Effect at Period End		0.25%			0.25%
Interest rate spread over variable rate		2.00%			2.00%													2.00%
Irrevocable standby letters of credit		1,400,000			1,400,000
Letter guarantee		100,000			100,000
Option to buy out capital lease, year					2013
Capital lease, expiration date					2021
Capital lease obligation		7,700,000			7,700,000
Amortization expense related to the capital lease		100,000	100,000		200,000	300,000
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation		900,000			900,000			800,000
Interest expense on outstanding debt		500,000	700,000		1,100,000	1,500,000
Unused commitment fee		100,000	100,000		300,000	200,000
Interest rate swap derivative, percentage of debt hedged																			65.00%
Interest expense on capital lease		$ 100,000	$ 400,000		$ 300,000	$ 800,000