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Stock-Based Compensation (Activity in the Stock Plan) (Details) - shares	1 Months Ended	3 Months Ended	123 Months Ended	171 Months Ended
	May 31, 2014	Mar. 31, 2019	Mar. 31, 2019	Mar. 31, 2019
Employee Stock Award Plan-2008
Authorized Shares Available for Future Award Grants
Beginning balance (in shares)		890,857	1,900,000
Additional shares authorized (in shares)	1,500,000	0	1,500,000
Number of awards granted (in shares)		(116,833)	(3,139,900)
Number of awards forfeited or expired (in shares)		26,145	540,069
Ending balance (in shares)		800,169	800,169	800,169
Employee Stock Award Plan-2008 | Options Awards
Authorized Shares Available for Future Award Grants
Number of option awards exercised (in shares)		27,815	1,352,429
Employee Stock Award Plan-2008 | Unrestricted Stock Awards
Authorized Shares Available for Future Award Grants
Number of awards granted (in shares)		0	(9,370)
Employee Stock Award Plan-2008 | Restricted Stock Awards
Authorized Shares Available for Future Award Grants
Number of restricted stock awards vested (in shares)		41,468	99,661
Director Plan - 2005
Authorized Shares Available for Future Award Grants
Beginning balance (in shares)		49,163		300,000
Number of awards granted (in shares)		0		(274,840)
Number of awards forfeited or expired (in shares)		0		24,003
Ending balance (in shares)		49,163	49,163	49,163
Director Plan - 2005 | Options Awards
Authorized Shares Available for Future Award Grants
Number of option awards exercised (in shares)		1,131		119,092
Number of restricted stock awards vested (in shares)		0		71,541

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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