Debt - Schedule of Net Interest Expense (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest Income Expense Net [Abstract]
Interest expense									$ 11,104	$ 9,998	$ 9,839
Interest income									(57)	(112)	(359)
Interest expense net of interest income									11,047	9,886	9,480
Capitalized interest									(689)	(287)	(385)
Interest expense, net	$ 2,863	$ 2,987	$ 2,329	$ 2,179	$ 2,225	$ 2,684	$ 2,086	$ 2,604	$ 10,358	$ 9,599	$ 9,095