XML 25 R57.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Stockholders' Equity - Additional Information (Detail) In Millions, unless otherwise specified | Dec. 31, 2014
--- | ---
Equity [Abstract] |
Maximum number of shares authorized to be repurchased | 4.8 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased

X
- Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant