Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2016 |
Mar. 31, 2015 |
|
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] | ||
| Net income | $ 83,300 | $ 54,971 |
| Other comprehensive income, net of tax: | ||
| Change in value of derivatives | 21 | 21 |
| Other comprehensive income | 21 | 21 |
| Comprehensive income | $ 83,321 | $ 54,992 |