Cash Flow Statement Classification Error - Additional Information (Detail) - 6 months ended Jun. 30, 2015 - USD ($) $ in Millions	Total
Quantifying Misstatement In Current Year Financial Statements [Line Items]
Immaterial error correction, description	The classification error had no effect on the reported net change in cash and cash equivalents, and also had no effect on the consolidated balance sheet, the consolidated statement of operations, or the consolidated statement of stockholders’ equity. Based on our evaluation of relevant quantitative and qualitative factors, we have determined that the classification error is and was immaterial.
Effect of exchange rate changes on cash overstated [Member]
Quantifying Misstatement In Current Year Financial Statements [Line Items]
Cash flow statement classification error	$ 2.4
Net cash provided by operating activities overstated [Member]
Quantifying Misstatement In Current Year Financial Statements [Line Items]
Cash flow statement classification error	$ 2.4