Share-Based Payment Arrangements (Tables)

6 Months Ended

Jun. 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	(32,458)		37.02			564
Cancelled/Forfeited	—		—			—
Expired	(2,298)		44.91			10
Outstanding at June 30, 2018	53,545	$	33.09	2.8	$	726
Exercisable at June 30, 2018	53,545	$	33.09	2.8	$	726

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	82,876		48.81
Vested	(28,835)		32.65
Forfeited	(49,687)		36.49
Nonvested at June 30, 2018	1,713,296	$	37.60