Long-Term Obligations (Tables)

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

Long-term obligations consist of the following (in thousands, except percentages):

	September 30, 2013			December 31, 2012
5% Convertible Senior Notes due October 2017, interest payable semi-annually in April and October, beginning April 1, 2013	$	130,000		$	130,000
Bank loans due May 2015, principal and interest payable monthly, weighted-average effective interest rate of 5.5%; net of unamortized discounts of $153 and $326 at September 30, 2013 and December 31, 2012, respectively	12,669			17,949
Obligation for building and improvements, effective interest of 4.9% at September 30, 2013 and December 31, 2012, expiring October 2026	6,176			6,318
Capital lease liabilities expiring January 2016, net of unamortized discounts of $71 and $117 at September 30, 2013 and December 31, 2012, respectively	302			375
Total long-term obligations	149,147			154,642
Less current portion	(7,631		)	(7,601		)
Non-current portion	$	141,516		$	147,041