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Summary of Significant Accounting Policies - Summary of Cash Dividends Declared (Detail) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Mar. 31, 2014
Jun. 30, 2014
Accounting Policies [Abstract]      
Dividends declared per share $ 0.10 $ 0.10 $ 0.20