Components of Change in Fair Value Associated With Green Bay Option (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ending Balance	$ (31)
Green Bay Option - exercised in 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Beginning Balance	(11,386)		(11,398)
Fair value adjustment	(1,852)		12
Add: Option exercise	9,534
Ending Balance	0		(11,386)
Green Bay Option - exercised in 2013 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ending Balance			(11,386)	[1]
Contingent Consideration
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Ending Balance	(31)		0
Contingent Consideration | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Add: Acquisition of WFME	$ (31)	[2]

[1] The fair value of the Green Bay Option was determined using inputs that are supported by little or no market activity (a Level 3 measurement). The fair value represents an estimate of the net amount that the Company would pay if the option was transferred to another party as of the date of the valuation. The option valuation incorporates a credit risk adjustment to reflect the probability of default by the Company.

[2] The fair value of the contingent consideration was determined using inputs that are supported by little or no market activity (a Level 3 measurement). Contingent consideration represents the fair value of the additional cash consideration potentially payable as part of the WFME Asset Exchange if certain future conditions are met as detailed in the purchase agreement. See Note 2 “Acquisitions and Dispositions”.