CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Mar. 31, 2017 |
|
| Statement Of Income And Comprehensive Income [Abstract] | ||
| Net income | $ 19,420 | $ 22,701 |
| Amounts related to available-for-sale securities: | ||
| Change in net unrealized gains (losses) | (44,053) | 3,996 |
| Amounts related to cash flow hedges: | ||
| Change in net unrealized gains (losses) | 30,933 | 8,096 |
| Reclassification adjustment for amounts included in net income | (4,644) | 1,661 |
| Other comprehensive income (loss) | (17,764) | 13,753 |
| Comprehensive income | $ 1,656 | $ 36,454 |