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Changes in Stockholders' Equity and Comprehensive Income - Summary of Changes in stockholders' equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2015
Additional Paid-In Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 3,117
Share based compensation	371
Ending balance	3,488
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	72,343
Dividends declared	(3,646)
Net income	5,757
Ending balance	74,454
Accumulated Other Comprehensive Gain (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(54)
Net change in unrealized loss on short term investments	(35)
Ending balance	(89)
Beginning balance	75,435
Net income	5,757
Net change in unrealized loss on short term investments	(35)
Ending balance	$ 77,882

X

- Definition

This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

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The change in unrealized holding gain (loss), net of tax, on available-for-sale securities included in a separate component of shareholders' equity during the period.

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

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The portion of profit or loss for the period, net of income taxes, which is attributable to the 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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