Organization and Basis of Presentation - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |
---|---|---|
Dec. 31, 2014
segment
|
Dec. 31, 2012
|
|
Condensed Financial Statements, Captions [Line Items] | ||
Number of reportable segments | 2 | |
Interest Revenue [Member] | ||
Condensed Financial Statements, Captions [Line Items] | ||
Reclassified amount | $ 11.0 | |
Interest Expense [Member] | ||
Condensed Financial Statements, Captions [Line Items] | ||
Reclassified amount | $ 10.2 |