Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income
Balance, beginning	$ 17,744	$ 9,645
Other comprehensive income before reclassification	(481)	5,598
Amounts reclassified from accumulated other comprehensive income	764	45
Net current period other comprehensive income	283	5,643
Balance, end	18,027	15,288
Available-For-Sale Securities
Accumulated Other Comprehensive Income
Balance, beginning	27,945	8,485
Other comprehensive income before reclassification	3,201	8,951
Amounts reclassified from accumulated other comprehensive income	(3)	45
Net current period other comprehensive income	3,198	8,996
Balance, end	31,143	17,481
Derivatives Used for Cash Flow Hedges
Accumulated Other Comprehensive Income
Balance, beginning	(10,201)	1,160
Other comprehensive income before reclassification	(3,682)	(3,353)
Amounts reclassified from accumulated other comprehensive income	767	0
Net current period other comprehensive income	(2,915)	(3,353)
Balance, end	$ (13,116)	$ (2,193)

- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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