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Basis of Presentation - Schedule of Condensed Consolidated Balance Sheet (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Refundable income taxes $ 6,333 $ 9,260 $ 1,073
Total current assets 179,511 180,386 243,580
Total assets 355,820 360,382 433,459
Retained earnings 139,546 136,354 148,458
Total stockholders' equity 252,951 248,884 261,850
Total liabilities and stockholders' equity 355,820 360,382 433,459
As Previously Reported [Member]
      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Refundable income taxes   11,474  
Total current assets   182,600  
Total assets   362,596  
Retained earnings   138,568  
Total stockholders' equity   251,098  
Total liabilities and stockholders' equity   362,596  
Adjustment [Member]
      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Refundable income taxes   (2,214)  
Total current assets   (2,214)  
Total assets   (2,214)  
Retained earnings   (2,214)  
Total stockholders' equity   (2,214)  
Total liabilities and stockholders' equity   $ (2,214)