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Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Disclosures [Abstract]

Carrying Value and Estimated Fair Value of Financial Instruments

The following table presents the financial instruments that are not carried at fair value but which require fair value disclosure:

	December 31,								September 30,
	2014								2015
	Carrying				Fair				Carrying				Fair
	amount				value				amount				value
	(In thousands)
Cash and cash equivalents	$	45,570			$	45,570			$	47,904			$	47,904
Accounts receivable, net		8,747				8,747				11,605				11,605
Accounts payable		3,850				3,850				3,064				3,064