Share-Based Payment Arrangements (Tables)

9 Months Ended

Sep. 30, 2018

Share-Based Payment Arrangements [Abstract]

Summary of Option Activity

				Weighted
				Average
		Weighted		Remaining
		Average		Contractual	Aggregate
	Number of	Exercise		Term	Intrinsic
Options	Shares	Price		(Years)	Value ($000)
Outstanding at January 1, 2018	88,301	$	34.84	2.8	$	1,294
Exercised/Released	(35,317)		37.39			592
Cancelled/Forfeited	—		—			—
Expired	(2,298)		44.91			10
Outstanding at September 30, 2018	50,686	$	32.61	2.6	$	757
Exercisable at September 30, 2018	50,686	$	32.61	2.6	$	757

Summary of Nonvested Restricted and Performance Shares

			Weighted
			Average
	Number of		Grant Date
	Shares		Fair Value
Nonvested at January 1, 2018	1,708,942	$	37.05
Granted	94,958		49.57
Vested	(41,502)		31.85
Forfeited	(60,859)		36.79
Nonvested at September 30, 2018	1,701,539	$	37.88