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Equity Incentive Awards (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

A summary of our restricted stock activity, and related information for the years ended December 31, 2015, 2014, and 2013 follows:

	Number of Shares		Weighted Average Grant Date Fair Value
Balance at December 31, 2012	94,020		$	32.97
Shares granted	173,332		37.32
Shares vested	(167,564	)	34.97
Balance at December 31, 2013	99,788		37.17
Shares granted	186,666		42.61
Shares vested	(184,229	)	40.49
Balance at December 31, 2014	102,225		41.09
Shares granted	158,014		54.68
Shares vested	(174,739	)	49.17
Balance at December 31, 2015	85,500		49.72

Summary of Stock Option Activity

A summary of our stock option activity, and related information for the years ended December 31, 2015, 2014, and 2013 follows:

		Shares Subject To Options			Weighted Average Exercise Price Per Share				Weighted Average Outstanding Contractual Life (in years)
Balance at December 31, 2012		1,105,600			$	21.78			4.0
Options exercised		(20,000	)		12.34
Balance at December 31, 2013		1,085,600			21.95				3.1
Options exercised		—			—
Balance at December 31, 2014		1,085,600			21.95				2.1
Options exercised		(220,000	)		17.35
Balance at December 31, 2015		865,600			23.12				1.6
Exercisable at December 31, 2015		865,600			23.12				1.6

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- Definition

Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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