Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Reconciliation between U.S, Statutory Federal Income Tax Rate and Effective Income Tax Rate (Detail)

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Summary of Significant Accounting Policies - Reconciliation between U.S, Statutory Federal Income Tax Rate and Effective Income Tax Rate (Detail)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Accounting Policies [Abstract]    
U.S. statutory federal income tax rate 0.00% 34.00%
State taxes, net of U.S. federal income tax benefit 0.00% 21.40%
Other adjustments 24.00% 0.10%
Effective tax rate 24.00% 55.50%