|
Allowance for Doubtful Accounts Activity (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] | |||
| Balance at beginning of period | $ 621 | $ 577 | $ 793 |
| Charged to costs and expenses | 256 | 772 | 594 |
| Write-offs, net of recoveries | 294 | 728 | 810 |
| Balance at end of period | $ 583 | $ 621 | $ 577 |