Derivatives Instrument and Hedging Activities (AOCL) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2016	Dec. 31, 2015
Changes in accumulated other comprehensive loss
Balances	$ 579,563
Balances	607,875	$ 579,563
(Losses) Gains on Cash Flow Hedges
Changes in accumulated other comprehensive loss
Balances	(158)
Other comprehensive loss before reclassifications, net of tax	(3,212)	(808)
Amounts reclassified from accumulated other comprehensive loss to interest expense, net of tax	358	650
Unrealized loss on derivatives, net of tax	(2,854)	(158)
Balances	$ (3,012)	$ (158)

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount after tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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