Financial instruments (Tables)

12 Months Ended

Dec. 31, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value

The following table presents the location and fair value of derivative instruments designated as hedging instruments in the consolidated balance sheet as of December 31, 2015 and 2014:



	December 31, 2015		December 31, 2014
	Fair Value
	(Dollars in thousands)
Asset derivatives:
Foreign currency forward contracts
Prepaid expenses and other current assets	$	285	$	—
Total asset derivatives	$	285	$	—
Liability derivatives:
Foreign currency forward contracts
Other current liabilities	$	807	$	—
Total liability derivatives	$	807	$	—

After Tax Gain/(Loss) Recognized in OCI

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 years ended December 31, 2015, 2014 and 2013:



	After Tax Gain (Loss) Recognized in OCI
	2015			2014		2013
	(Dollars in thousands)
Foreign currency exchange contracts	$	(2,491	)	$	—	$	381
Total	$	(2,491	)	$	—	$	381

Aggregate Accounts Receivable, Net of Allowance for Doubtful Accounts

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 December 31, 2015 and 2014 are as follows:



	December 31, 2015			December 31, 2014
	(Dollars in thousands)
Current and long-term accounts receivable (net of allowances of $7.2 million and $8.1 million in 2015 and 2014, respectively) in Greece, Italy, Spain and Portugal ⁽¹⁾	$	62,272		$	76,190
Percentage of total net current and long-term accounts receivables	23.9		%	27.3		%

(1) The long-term portion of accounts receivable, net from customers in Greece, Italy, Spain and Portugal at December 31, 2015 and 2014 was $8.1 million and $11.3 million, respectively, and is reported on the consolidated balance sheet in other assets.