XML 65 R51.htm IDEA: XBRL DOCUMENT v3.8.0.1
Income Taxes - Additional Information (Detail) - USD ($)
 1 Months Ended 11 Months Ended 12 Months Ended
Jan. 31, 2018
Dec. 31, 2017
Jan. 31, 2019
Jan. 31, 2018
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
Income Taxes [Line Items]              
Corporate tax rate 21.00% 35.00%   33.80% 35.00% 35.00%  
One-time transition tax on certain unrepatriated earnings of foreign subsidiaries payable period       8 years      
Provisional tax expense       $ 12,022,000      
Provisional Transition Tax obligation       52,683,000      
Unremitted foreign E&P $ 458,221,000     $ 458,221,000      
Percentage of U.S. shareholder’s pro rata share       10.00%      
Net deferred tax assets 46,202,000     $ 46,202,000 $ 52,664,000    
Valuation allowance for certain other foreign and state net operating loss carryforwards 0     0      
Cash and cash equivalents 282,220,000     282,220,000 248,140,000 $ 265,276,000 $ 154,558,000
Unrecognized tax benefit that, if recognized, would impact the effective tax rate 4,127,000     4,127,000 4,466,000    
Recognized (benefit)/expense in interest and penalties       (209,000) (218,000) $ (686,000)  
Accrued amounts for payment of interest and penalties 568,000     568,000 582,000    
Unrecognized tax benefits, lower bound 0     0      
Unrecognized tax benefits, upper bound 3,656,000     3,656,000      
U.S. Federal              
Income Taxes [Line Items]              
Net deferred tax assets 19,061,000     19,061,000 28,549,000    
Net operating loss carryforwards 5,875,000     5,875,000      
Tax credit carryforwards 6,448,000     $ 6,448,000      
U.S. Federal | Earliest Tax Year              
Income Taxes [Line Items]              
Expiration date       2021      
Tax credit expiration date       2019      
U.S. Federal | Latest Tax Year              
Income Taxes [Line Items]              
Expiration date       2038      
Tax credit expiration date       2031      
State and Local Jurisdiction              
Income Taxes [Line Items]              
Net deferred tax assets 16,848,000     $ 16,848,000 14,798,000    
Foreign Jurisdictions              
Income Taxes [Line Items]              
Net deferred tax assets 10,293,000     10,293,000 $ 9,317,000    
Net operating loss carryforwards, expire 2018 through 2028 477,000     477,000      
Net operating loss carryforwards, do not expire 7,941,000     7,941,000      
Cash and cash equivalents 308,520,000     308,520,000      
Cumulative undistributed earnings $ 458,221,000     458,221,000      
Additional federal income taxes due to repatriation       $ 0      
Foreign Jurisdictions | Earliest Tax Year              
Income Taxes [Line Items]              
Expiration date       2018      
Foreign Jurisdictions | Latest Tax Year              
Income Taxes [Line Items]              
Expiration date       2028      
Scenario, Plan              
Income Taxes [Line Items]              
Corporate tax rate     21.00%