Employee Severance Benefits (Tables)

12 Months Ended

Dec. 31, 2014

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Provision for Employee Severance Benefits

The employee severance benefits were as follows:

	2013			2014
Provision for employee severance benefits:
Balance at January 1	$	300		$	11,003
Provision for the year		14,017			195
Payments during the year		(3,314	)		(11,094	)
Balance at December 31	$	11,003		$	104