|
Allowance for Doubtful Accounts (Detail) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Financing Receivable, Allowance for Credit Losses [Line Items] | |||
| Balance at beginning of period | $ 6,128 | $ 2,636 | $ 1,232 |
| Bad debt expense | 3,275 | 6,517 | 2,206 |
| Write-offs, net | (3,875) | (3,025) | (802) |
| Balance at end of period | $ 5,528 | $ 6,128 | $ 2,636 |