Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
$ in Thousands |
3 Months Ended |
12 Months Ended |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Accounting Policies [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Purchases of short-term investments |
|
|
|
|
|
|
|
|
$ 30,000
|
|
|
| Estimated losses for bad debts |
|
|
|
|
|
|
|
|
800
|
$ 500
|
$ 400
|
| Bad debts actually charged off |
|
|
|
|
|
|
|
|
1,400
|
600
|
900
|
| Long term debt fair value |
$ 292,800
|
|
|
|
$ 316,600
|
|
|
|
$ 292,800
|
316,600
|
|
| Percentage of tax benefit recognized |
|
|
|
|
|
|
|
|
50.00%
|
|
|
| Advertising expense |
|
|
|
|
|
|
|
|
$ 400
|
500
|
500
|
| Retransmission consent revenue |
|
|
|
|
|
|
|
|
29,600
|
27,900
|
26,400
|
| Net revenue |
70,291
|
$ 65,281
|
$ 64,829
|
$ 58,113
|
65,432
|
$ 69,261
|
$ 59,891
|
$ 59,550
|
258,514
|
254,134
|
242,038
|
| Broadcast trade cost |
|
|
|
|
|
|
|
|
$ 500
|
$ 500
|
$ 500
|
| Shares of dilutive securities not included in computation of diluted earnings per share |
|
|
|
|
|
|
|
|
698,344
|
299,143
|
1,116,750
|
| Comprehensive income (loss) |
|
|
|
|
|
|
|
|
$ 1,138
|
$ (1,977)
|
$ (2,372)
|
| Unamortized debt issuance costs |
2,365
|
|
|
|
$ 3,226
|
|
|
|
2,365
|
3,226
|
|
| Broadcast Equipment |
|
|
|
|
|
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Net revenue |
|
|
|
|
|
|
|
|
$ 500
|
$ 500
|
$ 500
|
| Univision |
|
|
|
|
|
|
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|
|
|
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| Accounting Policies [Line Items] |
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| Period to grant television station for terms of retransmission consent agreements |
|
|
|
|
|
|
|
|
6 years
|
|
|
| Retransmission consent agreements expired date |
|
|
|
|
|
|
|
|
Dec. 31, 2014
|
|
|
| Retransmission consent agreements extended expiration date |
|
|
|
|
|
|
|
|
Mar. 31, 2017
|
|
|
| Interest Rate Swap Agreements |
|
|
|
|
|
|
|
|
|
|
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| Accounting Policies [Line Items] |
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|
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| Interest rate swap effective date |
|
|
|
|
|
|
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|
Dec. 31, 2015
|
|
|
| Chanclazo Studios, Inc |
|
|
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|
|
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|
|
|
|
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| Accounting Policies [Line Items] |
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|
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| Cost method investments |
$ 500
|
|
|
|
|
|
|
|
$ 500
|
|
|
| Cost method investment ownership percentage |
6.00%
|
|
|
|
|
|
|
|
6.00%
|
|
|
| Certificate of Deposit |
|
|
|
|
|
|
|
|
|
|
|
| Accounting Policies [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
| Purchases of short-term investments |
|
|
|
$ 30,000
|
|
|
|
|
|
|
|