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Note 12 - Stockholders' Equity and Earnings Per Share - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Beginning balance, loss, net of tax | $ 1,747,778 | $ 1,602,888 | $ 1,458,971
Total other comprehensive (loss)/income, net of tax | 4,711 | (2,857) | 24,160
Ending balance, loss, net of tax | 1,828,539 | 1,747,778 | 1,602,888
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] |  |  |
Beginning balance, loss, net of tax | (5,431) | (3,172) |
Net unrealized (losses)/gains arising during the period, pre-tax | 11,603 | (7,247) |
Net unrealized (losses)/gains arising during the period, tax | 4,878 | (3,047) |
Net unrealized (losses)/gains arising during the period, net of tax | 6,725 | (4,200) |
Reclassification adjustment for net losses/(gains) included in net income, pre-tax | (4,898) | 3,349 |
Reclassification adjustment for net losses/(gains) included in net income, tax | (2,059) | 1,408 |
Reclassification adjustment for net losses/(gains) included in net income, net of tax | (2,839) | 1,941 |
Total other comprehensive (loss)/income, pre-tax | 6,705 | (3,898) |
Total other comprehensive (loss)/income, tax | 2,819 | (1,639) |
Total other comprehensive (loss)/income, net of tax | 3,886 | (2,259) |
Ending balance, loss, net of tax | (1,545) | (5,431) | (3,172)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] |  |  |
Beginning balance, loss, net of tax | (2,995) | (2,397) |
Net unrealized (losses)/gains arising during the period, pre-tax | 1,423 | (1,032) |
Net unrealized (losses)/gains arising during the period, tax | 598 | (434) |
Net unrealized (losses)/gains arising during the period, net of tax | 825 | (598) |
Reclassification adjustment for net losses/(gains) included in net income, pre-tax |  |  |
Reclassification adjustment for net losses/(gains) included in net income, tax |  |  |
Reclassification adjustment for net losses/(gains) included in net income, net of tax |  |  |
Total other comprehensive (loss)/income, pre-tax | 1,423 | (1,032) |
Total other comprehensive (loss)/income, tax | 598 | (434) |
Total other comprehensive (loss)/income, net of tax | 825 | (598) |
Ending balance, loss, net of tax | (2,170) | (2,995) | (2,397)
AOCI Attributable to Parent [Member] |  |  |
Beginning balance, loss, net of tax | (8,426) | (5,569) | (29,729)
Net unrealized (losses)/gains arising during the period, pre-tax | 13,026 | (8,279) |
Net unrealized (losses)/gains arising during the period, tax | 5,476 | (3,481) |
Net unrealized (losses)/gains arising during the period, net of tax | 7,550 | (4,798) |
Reclassification adjustment for net losses/(gains) included in net income, pre-tax | (4,898) | 3,349 |
Reclassification adjustment for net losses/(gains) included in net income, tax | (2,059) | 1,408 |
Reclassification adjustment for net losses/(gains) included in net income, net of tax | (2,839) | 1,941 |
Total other comprehensive (loss)/income, pre-tax | 8,128 | (4,930) |
Total other comprehensive (loss)/income, tax | 3,417 | (2,073) |
Total other comprehensive (loss)/income, net of tax | 4,711 | (2,857) | 24,160
Ending balance, loss, net of tax | $ (3,715) | $ (8,426) | $ (5,569)

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