Accrued and other liabilities: (Tables)

12 Months Ended

Dec. 31, 2013

Accrued and other liabilities:

Schedule of accrued and other current liabilities

 Accrued and other current liabilities as of December 31 consist of the following (in thousands):

	2013		2012
Operating accruals	$	11,539	$	8,283
Deferred revenue—current portion		4,174		4,132
Payroll and benefits		2,952		2,358
Taxes—non-income based		1,128		692
Interest		11,672		11,054
Total	$	31,465	$	26,519

Schedule of reconciliation of the amounts related to leased facility asset retirement obligations

A reconciliation of the amounts related to its leased facility asset retirement obligations is as follows (in thousands):

Asset retirement obligations
Balance—December 31, 2010	$	233
Effect of exchange rates		(5	)
Amortization of discount		11
Balance—December 31, 2011		239
Effect of exchange rates		5
Amortization of discount		12
Balance—December 31, 2012		256
Effect of exchange rates		11
Amortization of discount		12
Balance—December 31, 2013 (recorded as other long term liabilities)	$	279