Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Estimated Fair Value of Option Granted Using Black-Scholes Option Pricing Model

The fair value of each option granted in 2016, 2015 and 2014 was estimated on the date of the grant using the Black-Scholes option pricing model with the following assumptions:

Expected Volatility		20	%
Expected Term		6.5 years
Expected Dividends		None
Weighted Average Risk Free Rate:
2016 grants		—	%
2015 grants		1.714	%
2014 grants		2.269	%
Weighted-Average Grant Fair Value:
2016 grants	$	—
2015 grants		9.88
2014 grants		9.04

Summary of Stock Option Activity

The following table summarizes the activities in the Plans during 2016:

(dollars in thousands except per share amounts)	Options Granted			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term		Aggregate Intrinsic Value
Balance: December 31, 2015		2,716,834		$	6.35
Options granted		—			—
Options exercised		(690,592	)		6.17
Options forfeited		(53,358	)		9.18
Balance: December 31, 2016		1,972,884			6.34		2.45 Years	$	15,601
Options exercisable		1,945,032		$	6.30		2.39 Years	$	15,457

The following table summarizes the activities in the Plans during 2015:

(dollars in thousands except per share amounts)	Options Granted			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term		Aggregate Intrinsic Value
Balance: December 31, 2014		2,769,616		$	6.34
Options granted		23,000			9.88
Options exercised		(62,614	)		6.47
Options forfeited		(13,168	)		8.24
Balance: December 31, 2015		2,716,834			6.35		3.52 Years	$	14,782
Options exercisable		2,599,010		$	6.23		3.30 Years	$	14,463

The following table summarizes the activities in the Plans during 2014:

(dollars in thousands except per share amounts)	Options Granted			Weighted Average Exercise Price per Share		Weighted Average Remaining Contractual Term		Aggregate Intrinsic Value
Balance: December 31, 2013		2,861,934		$	6.19
Options granted		142,750			9.04
Options exercised		(169,732	)		5.60
Options forfeited		(65,336	)		7.64
Balance: December 31, 2014		2,769,616			6.34		4.50 Years	$	7,378
Options exercisable		2,558,184		$	6.16		4.15 Years	$	7,272

Summary of RSUs Issued under Equity Incentive Plan

The following table provides a summary of the RSUs issued by the Company under its equity incentive plans for the periods ended December 31:

	2016				2015				2014
	Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value		Shares		Weighted Average Grant Date Fair Value
Balance: January 1	134,728		$	9.93	8,888		$	9.00	15,332		$	8.80
New RSUs	50,568			11.15	147,364			10.00	—			—
Shares vested and issued	(67,988	)		10.39	(21,524	)		10.00	(6,444	)		8.53
RSUs forfeited	—			—	—			—	—			—
Balance December 31	117,308		$	10.19	134,728		$	9.93	8,888		$	9.00