Financial instruments

Foreign Currency Forward Contracts Designated as Cash Flow Hedges

The Company uses derivative instruments for risk management purposes. Foreign currency forward contracts are used to manage foreign currency transaction exposure. These derivative instruments are designated as cash flow hedges and are recorded on the condensed consolidated balance sheet at fair market value. The effective portion of the gains or losses on derivatives is reported as a component of other comprehensive loss and thereafter is recognized in the condensed consolidated statement of income in the period or periods during which the hedged transaction affects earnings. Gains and losses on the derivatives representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness, if any, are recognized in the condensed consolidated statement of income in the period in which such gains and losses occur.

Non-designated Foreign Currency Forward Contracts

During the third quarter 2015, the Company began using foreign currency forward contracts as a part of its strategy to manage exposure related to near term foreign currency denominated monetary assets and liabilities. These currency forward contracts are not designated as cash flow, fair value or net investment hedges; therefore, the changes in fair value are recorded in the condensed consolidated statement of income as a selling, general and administrative expense. The Company enters into foreign currency forward contracts for periods consistent with currency transaction exposures, approximately one month. For the three months ended March 27, 2016, the Company recognized a loss related to non-designated foreign currency forward contracts of $0.3 million.

The following table presents the location of derivative financial instruments reported in the condensed consolidated balance sheet as of March 27, 2016 and December 31, 2015:



	March 27, 2016		December 31, 2015
	Fair Value		Fair Value
	(Dollars in thousands)
Asset derivatives:
Designated foreign currency forward contracts	$	2,252	$	285
Non-designated foreign currency forward contracts	259		44
Prepaid expenses and other current assets	$	2,511	$	329
Total asset derivatives	$	2,511	$	329
Liability derivatives:
Designated foreign currency forward contracts	$	1,705	$	807
Non-designated foreign currency forward contracts	168		491
Other current liabilities	$	1,873	$	1,298
Total liability derivatives	$	1,873	$	1,298

The total notional amount for all open foreign currency forward contracts designated as cash flow hedges as of March 27, 2016 and December 31, 2015 was $144.6 million and $49.5 million, respectively. The total notional amount for all open non-designated foreign currency forward contracts as of March 27, 2016 and December 31, 2015 was $78.3 million and $69.1 million, respectively. All open foreign currency forward contracts as of March 27, 2016 have durations of nine months or less.

The following table provides information as to the gains and losses attributable to derivatives in cash flow hedging relationships that were reported in other comprehensive income (loss) (“OCI”) for the three months ended March 27, 2016 and March 29, 2015:



	After Tax Gain (Loss) Recognized in OCI
	Three Months Ended
	March 27, 2016		March 29, 2015

Foreign currency forward contracts	$	1,480	$	44
Total	$	1,480	$	44

See Note 9 for information on the location in the condensed consolidated statements of income and amount of gains attributable to derivatives that were reclassified from accumulated other comprehensive loss (“AOCL”) to expense (income), net of tax.

There was no ineffectiveness related to the Company’s hedging derivatives during the three months ended March 27, 2016 and March 29, 2015.

Concentration of Credit Risk

Concentrations of credit risk with respect to trade accounts receivable are generally limited due to the Company’s large number of customers and their diversity across many geographic areas. A portion of the Company’s trade accounts receivable outside the United States, however, include sales to government-owned or supported healthcare systems in several countries which are subject to payment delays. Payment is dependent upon the creditworthiness of those countries and the financial stability of their economies.

An allowance for doubtful accounts is maintained for accounts receivable based on the Company’s historical collection experience and expected collectability of the accounts receivable, considering the time an account is outstanding, the financial position of the customer and information provided by credit rating services. The adequacy of this allowance is reviewed each reporting period and adjusted as necessary. The allowance for doubtful accounts was $8.4 million and $8.0 million at March 27, 2016 and December 31, 2015, respectively. The current portion of the allowance for doubtful accounts at March 27, 2016 and December 31, 2015 of $1.0 million and $2.0 million, respectively, was presented as part of accounts receivable, net. The allowance for doubtful accounts on receivables outstanding for greater than one year at March 27, 2016 and December 31, 2015 of $6.3 million and $6.0 million, respectively, was presented as part of other assets.

Certain of the Company’s customers, particularly in Europe, have extended or delayed payments for products and services already provided, raising collectability concerns regarding the Company’s accounts receivable from these customers, for the most part in Greece, Italy, Spain and Portugal. As a result, the Company continues to closely monitor the allowance for doubtful accounts in these locations. The aggregate net current and long-term accounts receivable for customers in Greece, Italy, Spain and Portugal and the percentage of the Company’s total net current and long-term accounts receivable represented by the net current and long-term accounts receivable for customers in those countries at March 27, 2016 and December 31, 2015 are as follows:



	March 27, 2016			December 31, 2015
	(Dollars in thousands)
Current and long-term accounts receivable (net of allowances of $7.3 million and $7.2 million at March 27, 2016 and December 31, 2015, respectively) in Greece, Italy, Spain and Portugal (1)	$	70,343		$	62,272
Percentage of total net current and long-term accounts receivable - Greece, Italy, Spain and Portugal	25.6		%	23.9		%

(1) The long-term portion of accounts receivable, net from customers in Greece, Italy, Spain and Portugal at March 27, 2016 and December 31, 2015 was $9.6 million and $8.1 million, respectively, and is reported on the condensed consolidated balance sheet in other assets.

For the three months ended March 27, 2016 and March 29, 2015, net revenues from customers in Greece, Italy, Spain and Portugal were $30.9 million and $33.0 million, respectively.