Long Term Debt (Narrative) (Details) $ in Thousands, THB in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2015 THB	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Line of Credit Facility [Line Items]
Credit Agreement maturity date	Nov. 12, 2020
Term Loan principal amount			$ 238,869	$ 9,521
Credit Agreement [Member]
Line of Credit Facility [Line Items]
Credit Agreement description	On November 12, 2015, the Company entered into a $430 million Credit Agreement (the Credit Agreement) by and among Benchmark, JPMorgan Chase Bank, N.A. as administrative agent and collateral agent (the Administrative Agent) and the financial institutions acting as lenders from time to time. This Credit Agreement provides for a five-year $200 million revolving credit facility and a five-year $230 million term loan facility (the Term Loan), both with a maturity date of November 12, 2020.
Credit Agreement issuer	JPMorgan Chase Bank, N.A. as administrative agent and collateral agent
Credit Agreement capacity			430,000
Possible increase to total commitments under Credit Agreement	$ 150,000
Description of variable interest rate basis	Interest on outstanding borrowings under the Credit Agreement accrues, at our option, at (a) the adjusted London interbank offered rate as administered by the ICE Benchmark Administration (LIBO) plus 1.25% to 2.25%, or (b) the alternative base rate plus 0.25% to 1.25%, and is payable quarterly in arrears. The alternative base rate is equal to the highest of (i) the Administrative Agent’s prime rate, (ii) the federal funds rate plus 0.50% and (iii) the adjusted LIBO rate plus 1.00%. The margin on the interest rates fluctuates based upon the ratio of Benchmark’s debt to its consolidated EBITDA (the Total Leverage Ratio).
Credit Agreement collateral	The Credit Agreement is generally secured by a pledge of (a) all the capital stock of Benchmark’s domestic subsidiaries and 65% of the capital stock of Benchmark’s foreign subsidiaries, (b) any indebtedness owed to Benchmark and its subsidiaries and (c) all or substantially all other personal property of Benchmark and its domestic subsidiaries (including, accounts receivable, inventory and fixed assets of Benchmark and its domestic subsidiaries), in each case, subject to customary exceptions and limitations.
Credit agreement, secured by percentage of stock of the Company's domestic subsidiaries	100.00%
Credit agreement, secured by percentage of voting capital stock of each direct foreign subsidiary	65.00%
Credit Agreement covenant terms	The Credit Agreement contains financial covenants as to debt leverage and interest coverage, and certain customary affirmative and negative covenants, including restrictions on our ability to incur additional debt and liens, pay dividends, repurchase shares, sell assets and merge or consolidate with other persons. Amounts due under the Credit Agreement may be accelerated upon specified events of default, including a failure to pay amounts due, breach of a covenant, material inaccuracy of a representation, or occurrence of bankruptcy or insolvency, subject, in some cases, to cure periods.
Credit Agreement covenant compliance	As of December 31, 2015, the Company was in compliance with all of these covenants and restrictions.
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit Agreement capacity			200,000
Term period	5 years
Credit Agreement maturity date	Nov. 12, 2020
Letters of credit outstanding amount			1,600
Revolving credit facility, available for future borrowings			198,400
Term Loan Facility [Member]
Line of Credit Facility [Line Items]
Term period	5 years
Credit Agreement maturity date	Nov. 12, 2020
Term Loan Description	The Term Loan must be repaid in 20 consecutive quarterly installments beginning March 31, 2016, with the balance payable on the maturity date.
Term Loan proceeds			230,000
Term Loan frequency of periodic payments	quarterly
Term Loan first required payment date	Mar. 31, 2016
Derivative Notional Amount			172,500
Term Loan principal amount			230,000
Letters of Credit [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility capacity availability			20,000
Foreign currencies [Member]
Line of Credit Facility [Line Items]
Revolving Credit Facility capacity availability			$ 20,000
Thailand Subsidiary [Member]
Line of Credit Facility [Line Items]
Credit Agreement capacity | THB		THB 350
Minimum [Member] | Credit Agreement [Member]
Line of Credit Facility [Line Items]
U.S. Credit facility, commitment fee	0.30%
Maximum [Member] | Credit Agreement [Member]
Line of Credit Facility [Line Items]
U.S. Credit facility, commitment fee	0.40%
LIBO Plus [Member] | Minimum [Member] | Credit Agreement [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.25%
LIBO Plus [Member] | Maximum [Member] | Credit Agreement [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.25%
Alternate Base Rate Plus [Member] | Minimum [Member] | Credit Agreement [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.25%
Alternate Base Rate Plus [Member] | Maximum [Member] | Credit Agreement [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.25%