Plan of Restructuring (Detail) - Schedule of Restructuring Reserve by Type of Cost (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Restructuring Balance	$ 73
Provision	173
Payment and Other Adjustment	64
Restructuring Balance	182
Employee Severance [Member]
Restructuring Balance	43
Provision	163
Payment and Other Adjustment	24
Restructuring Balance	182
Other Fees [Member]
Restructuring Balance	30
Provision	10
Payment and Other Adjustment	40
Restructuring Balance