Income Taxes - Additional Information (Detail) - USD ($)
|
12 Months Ended |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
| Income Taxes [Line Items] |
|
|
|
| Change in total valuation allowance |
$ 7,287,000
|
$ 1,754,000
|
$ 1,048,000
|
| Tax benefits associated with the exercise of SARs and stock options and the vesting of RSUs |
5,943,000
|
6,063,000
|
|
| Significant unrecognized tax benefits |
$ 0
|
0
|
0
|
| Income tax examinations, year |
2012
|
|
|
| Interest and penalties related to uncertain tax positions |
$ 0
|
0
|
$ 0
|
| Foreign Subsidiaries [Member] |
|
|
|
| Income Taxes [Line Items] |
|
|
|
| Earnings related to deferred income tax |
8,375,000
|
|
|
| Federal and State Capital Loss [Member] |
|
|
|
| Income Taxes [Line Items] |
|
|
|
| Net operating loss carryforwards |
$ 18,427,000
|
10,019,000
|
|
| Net operating loss carryforwards expiration date |
2034
|
|
|
| Foreign Tax Authority [Member] |
|
|
|
| Income Taxes [Line Items] |
|
|
|
| Net operating loss carryforwards |
$ 5,932,000
|
$ 5,642,000
|
|
| Net operating loss carryforwards expiration date |
2035
|
|
|
| Acquired Goodwill [Member] |
|
|
|
| Income Taxes [Line Items] |
|
|
|
| Useful life (years) |
15 years
|
|
|