Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2013

Commitments And Contingencies Disclosure [Abstract]

Summary of Liability Related to Lease

The following table provides information about the Company’s liability related to the lease (in thousands):

	2013			2012
Balance as of January 1	$	1,103		$	452
Net rental receipts (payments)		(111	)		(19	)
Accretion of discount		41			18
Increase in net estimated contract termination costs		79			39
Balance as of June 30	$	1,112		$	490

Summary of Reconciliation of Company's Warranty Reserve

The following is a reconciliation of the Company’s warranty reserve (in thousands):

	2013			2012
Beginning balance, January 1	$	28,987		$	16,345
Changes in estimates related to pre-existing warranties		—			1,487
Settlements made during the period		(3,740	)		(3,891	)
Ending balance, June 30	$	25,247		$	13,941