Income Taxes Changes in Unrecognized Tax Benefit (Including Interest and Penalties) (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($)
Reconciliation of Unrecognized Tax Benefits [Line Items]
Beginning Balance	$ 3,497
Additions for tax positions for current year	1,208
Additions for tax positions for prior years	228
Reduction for tax positions for prior years	(1,250)
Lapse of the applicable statute of limitations	(25)
Ending Balance	3,658
Unrecognized Tax Benefits Before Interest And Penalties
Reconciliation of Unrecognized Tax Benefits [Line Items]
Beginning Balance	3,397
Additions for tax positions for current year	1,208
Additions for tax positions for prior years	0
Reduction for tax positions for prior years	(1,228)
Lapse of the applicable statute of limitations	(20)
Ending Balance	3,357
Interest & Penalties
Reconciliation of Unrecognized Tax Benefits [Line Items]
Beginning Balance	100
Additions for tax positions for current year	0
Additions for tax positions for prior years	228
Reduction for tax positions for prior years	(22)
Lapse of the applicable statute of limitations	(5)
Ending Balance	$ 301