Income Taxes - Unrecognized Tax Benefits (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Contingency [Line Items]
Beginning balance	$ 14,067	$ 13,576	$ 13,058
Reductions
Reductions
Settlements
Lapses in statute of limitations		(137)
Ending balance	16,363	14,067	13,576
Federal [Member]
Income Tax Contingency [Line Items]
Tax positions related to current year, Additions	477	289	297
Tax positions related to prior year, Additions	636	37
State [Member]
Income Tax Contingency [Line Items]
Tax positions related to current year, Additions	381	302	221
Foreign [Member]
Income Tax Contingency [Line Items]
Tax positions related to prior year, Additions	$ 802