Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Statement Of Income And Comprehensive Income [Abstract] | |||
| Net income | $ 20,405 | $ 25,625 | $ 27,122 |
| Other comprehensive income (loss), net of tax: | |||
| Change in fair value of interest rate swap agreements | 1,138 | (1,977) | (2,372) |
| Total other comprehensive income (loss) | 1,138 | (1,977) | (2,372) |
| Comprehensive income | $ 21,543 | $ 23,648 | $ 24,750 |