Consolidated Statements of Shareholders' Equity (USD $) In Thousands	Total	Common Stock	Retained Earnings
Balance at May. 31, 2011	$ 240,375	$ 34,742	$ 205,633
Balance (in shares) at May. 31, 2011		23,981
Issuance of restricted stock		7
Excess tax benefit for share based compensation, net of tax deficit	46	46
Non-cash stock compensation expense	1,438	1,438
Dividends declared	(19,453)		(19,453)
Net settlement of shares	(47)
Net income	25,772		25,772
Balance at May. 31, 2012	248,131	36,179	211,952
Balance (in shares) at May. 31, 2012		23,988
Issuance of restricted stock		8
Excess tax benefit for share based compensation, net of tax deficit	251	251
Non-cash stock compensation expense	1,330	1,330
Dividends declared	(43,881)		(43,881)
Net settlement of shares	(36)	(36)
Net income	22,754		22,754
Balance at May. 31, 2013	228,549	37,724	190,825
Balance (in shares) at May. 31, 2013		23,996
Issuance of restricted stock		12
Excess tax benefit for share based compensation, net of tax deficit	183	183
Non-cash stock compensation expense	1,356	1,356
Dividends declared	(19,527)		(19,527)
Net settlement of shares	(11)	(11)
Net income	20,408		20,408
Balance at May. 31, 2014	$ 230,958	$ 39,252	$ 191,706
Balance (in shares) at May. 31, 2014		24,008