Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Line Items]
Effective income tax rate	(15.60%)	41.90%	23.20%
Pre-tax income	$ 26,354,000	$ 9,315,000	$ 3,734,000
Statutory Irish rate	12.50%	12.50%	12.50%
Reversal of reserves for uncertain tax positions	10,600,000
Excess tax benefits from share-based awards	3,813,000	(266,000)
Windfalls included in net operating loss carryforwards but not reflected in deferred tax assets		826,000
Net deferred tax assets	5,327,000	6,159,000
Valuation allowance	3,023,000	2,581,000
Liabilities for unrecognized tax benefits	195,000	7,276,000
Interest and penalties related to unrecognized tax benefits	866,000	1,470,000
Accrued income taxes (non-current)	2,094,000	14,559,000
Accrued interest and penalties	1,899,000	7,283,000
Unrecognized tax benefits that, if recognized, would affect the Company's provision for income taxes	1,280,000	10,519,000
Undistributed earnings of foreign subsidiaries	0
UNITED STATES
Income Taxes [Line Items]
Windfalls included in net operating loss carryforwards but not reflected in deferred tax assets	20,352,000	2,139,000
UNITED STATES | Federal
Income Taxes [Line Items]
Net operating loss carryforwards	32,431,000	11,218,000
Net operating loss carryforwards, expiration	From 2026 through 2033	From 2026 through 2033
UNITED STATES | State and Local Jurisdiction
Income Taxes [Line Items]
Net operating loss carryforwards	5,938,000	4,046,000
Net operating loss carryforwards, expiration	From 2017 through 2033	From 2017 through 2033
UNITED KINGDOM
Income Taxes [Line Items]
Windfalls included in net operating loss carryforwards but not reflected in deferred tax assets	1,434,000	0
Net operating loss carryforwards	4,113,000	2,310,000
Ireland
Income Taxes [Line Items]
Valuation allowance	2,581,000	2,581,000
Australia
Income Taxes [Line Items]
Valuation allowance	403,000
Mexico
Income Taxes [Line Items]
Valuation allowance	39,000
IRELAND
Income Taxes [Line Items]
Net operating loss carryforwards	$ 10,323,000	$ 10,323,000